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Calhoun Critical Zone Observatory

134-190 m elevation, 16 °C, 1250 mm/yr

The Calhoun Critical Zone Observatory is comprised of eight research areas in the Calhoun Experimental Forest and surrounding areas in the Sumter National Forest in upstate South Carolina, including the Holcombe's Branch watershed, experimental catchments, and space-for-time (paired hardwood-pine-cultivated field) plots. The areas were chosen primarily for their wealth of historical data giving researchers an ideal platform for testing hypotheses on how critical zones evolve in response to human forcings at the landscape scale.

Calhoun Critical Zone Observatory - GIS/Map Data - Research Areas (2014-2018)
3 components    Calhoun Critical Zone Observatory    All Disciplines    Brecheisen, Z.S.; Cook, Charles W.; Richter, Daniel deB.

Calhoun CZO - GIS/Map Data, LiDAR - Canopy Height (2014)
1 components    Calhoun Critical Zone Observatory    GIS / Remote Sensing, Biology / Ecology    Brecheisen, Zachary S.

Enoree District, Sumter National Forest - GIS/Map Data - Land Grants, 1749-1851 (2018)
1 components    Calhoun Critical Zone Observatory    Social Science    Coughlan, Michael R.; Nelson, Donald

National - Streamflow / Discharge - USGS and USDA Data Resources (1985-2017)
22 components    Boulder Creek Watershed, Santa Catalina Mountains, Jemez River Basin, Reynolds Creek Experimental Watershed, Susquehanna Shale Hills Critical Zone Observatory, Northeastern Puerto Rico and the Luquillo Mountains, Clear Creek Watershed, Sangamon River Basin, Calhoun Critical Zone Observatory, Providence Creek Headwater Catchments (1660 - 2115 m elevation)    Hydrology    USGS National Water Information System

National - LiDAR, Land Cover, GIS/Map Data - OpenTopography (2010-2017)
18 components    Boulder Creek Watershed, Eel River Watershed, Jemez River Basin, Reynolds Creek Experimental Watershed, Susquehanna Shale Hills Critical Zone Observatory, Northeastern Puerto Rico and the Luquillo Mountains, Sangamon River Basin, Clear Creek Watershed, Calhoun Critical Zone Observatory, Providence Creek Headwater Catchments (1660 - 2115 m elevation)    Geomorphology, GIS / Remote Sensing, Hydrology, Biology / Ecology    National Center for Airborne Laser Mapping; Boulder Creek Critical Zone Observatory; Calhoun Critical Zone Observatory; University of Arizona; University of California Merced; Valles Caldera National Preserve; Bandelier National Monument; National Park Service; Jemez River Basin and Santa Catalina Mountains Critical Zone Observatory; Luquillo Critical Zone Observatory; Reynolds Creek CZO; Eel River CZO; Shale Hills CZO

National - Air Temperature, Flux Tower, Meteorology - NADP and NOAA or other weather stations (2017)
8 components    Boulder Creek Watershed, Calhoun Critical Zone Observatory, Jemez River Basin, Susquehanna Shale Hills Critical Zone Observatory    Climatology / Meteorology    NADP; NOAA; others


Calhoun CZO Research Area 8

0.77 km2,

Calhoun Research Area 8, the newest and easternmost of the 8 CCZO research areas, includes adjacent pine and hardwood stands.

Calhoun CZO - Soil Biogeochemistry (2015-2016)
1 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 2, Calhoun CZO Research Area 7, Calhoun CZO Research Area 8    Biogeochemistry, Biology / Ecology, Soil Science / Pedology    Sharon Billings; Christoph Lehmeier; Kyungjin Min; Samik Bagchi; Emma Hauser; Keelan Barger; Samantha Elledge; Rebecca Flournoy; Carl Heroneme; Hanna Rankin; Rena Stair

Calhoun CZO - Photographic Imagery, Soil Survey - Soil Pit Profiles (2016)
4 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 2, Calhoun CZO Research Area 7, Calhoun CZO Research Area 8    Soil Science / Pedology    Cook, Charles W.

Calhoun CZO - Soil Geochemistry (2016)
1 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 2, Calhoun CZO Research Area 6, Calhoun CZO Research Area 7, Calhoun CZO Research Area 8    Geochemistry / Mineralogy    Austin, Jason C.; Schroeder, Paul A.


Calhoun CZO Research Area 7

Calhoun Research Area 7, located south of the Enoree River, includes adjacent pine and hardwood stands. This is the southernmost of the 8 CCZO research areas.

Calhoun Critical Zone Observatory - Soil Moisture - Hydroprobe (2016-2018)
1 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 4, Calhoun CZO Research Area 7    Hydrology, Biogeochemistry, Soil Science / Pedology    Austin, Jason C.; Brecheisen, Zachary S.; Cook, Charles W.; Heine, Paul R.; Richter, Daniel deB.

Calhoun CZO - Soil Biogeochemistry (2015-2016)
1 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 2, Calhoun CZO Research Area 7, Calhoun CZO Research Area 8    Biogeochemistry, Biology / Ecology, Soil Science / Pedology    Sharon Billings; Christoph Lehmeier; Kyungjin Min; Samik Bagchi; Emma Hauser; Keelan Barger; Samantha Elledge; Rebecca Flournoy; Carl Heroneme; Hanna Rankin; Rena Stair

Calhoun CZO - Soil Texture (2015-2016)
1 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 4, Calhoun CZO Research Area 7    Soil Science / Pedology    Heine, Paul R

Calhoun CZO - Soil Porosity, Soil Invertebrates (2015-2017)
2 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 4, Calhoun CZO Research Area 7    Soil Science / Pedology, Biology / Ecology    Brecheisen, Zachary S..; Callaham, M.A.; Heine, P.R.; Cook, Charles W.; Richter, Daniel deB.

Calhoun CZO - Photographic Imagery, Soil Survey - Soil Pit Profiles (2016)
4 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 2, Calhoun CZO Research Area 7, Calhoun CZO Research Area 8    Soil Science / Pedology    Cook, Charles W.

Calhoun CZO - Soil Geochemistry (2016)
1 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 2, Calhoun CZO Research Area 6, Calhoun CZO Research Area 7, Calhoun CZO Research Area 8    Geochemistry / Mineralogy    Austin, Jason C.; Schroeder, Paul A.

Research areas 1, 4, 7 - Soil Gas (2015-2017)
2 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 4, Calhoun CZO Research Area 7    Biogeochemistry, Soil Science / Pedology    Brecheisen, Z. S.; Cook, Charles W.; Richter, Daniel deB.


Calhoun CZO Research Area 6

0.30 km2,

Research Area 6 is centered on the historic Rose Hill Plantation, home of South Carolina's secessionist governor William Henry Gist (1807-1874).

Calhoun CZO - Soil Geochemistry (2016)
1 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 2, Calhoun CZO Research Area 6, Calhoun CZO Research Area 7, Calhoun CZO Research Area 8    Geochemistry / Mineralogy    Austin, Jason C.; Schroeder, Paul A.


Calhoun CZO Research Area 5

Calhoun Research Area 5, located at the corner of Old Buncombe and Sardis Roads, includes adjacent pine and hardwood stands.

Calhoun CZO - Vegetation - Litterfall (2014-2017)
1 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 2, Calhoun CZO Research Area 3, Calhoun CZO Research Area 4, Calhoun CZO Research Area 5    Biology / Ecology    Cook, Charles W.; O'Neill, K. P.; Richter, Daniel deB.


Calhoun CZO Research Area 3

6.5 km2, 108-195 m elevation, 16 °C, 1250 mm/yr

The largest of the research areas at the Calhoun, Research Area 3 encompasses the Holcombe's Branch watershed. This is the most intensely studied area in the CCZO for ecohydrology, geophysics, and soil organic carbon dynamics research.

Calhoun Critical Zone Observatory - Soil Moisture - Saturated Hydraulic Conductivity (Ksat) (2017)
2 components    Calhoun CZO Research Area 2, Calhoun CZO Research Area 3    Soil Science / Pedology    Ryland, Rachel; Markewitz, Daniel; Sutter, Lori

Calhoun CZO - Soil Survey - Soil Texture (2014-2015)
3 components    Calhoun CZO Research Area 3, Calhoun CZO Research Area 4    Soil Science / Pedology    Heine, Paul

Calhoun CZO - Streamflow / Discharge (2014-2017)
1 components    Calhoun Experimental Forest and Eco-hydrology Experiments, Calhoun CZO Research Area 3    Hydrology    Mallard, John McDevitt

Calhoun CZO - Vegetation - Litterfall (2014-2017)
1 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 2, Calhoun CZO Research Area 3, Calhoun CZO Research Area 4, Calhoun CZO Research Area 5    Biology / Ecology    Cook, Charles W.; O'Neill, K. P.; Richter, Daniel deB.

Calhoun CZO - Geomorphology - Gully Boundaries (2015)
1 components    Calhoun CZO Research Area 3    Geomorphology, Hydrology    Leonardo V. Noto; Yannis Dialynas; Satish Bastola

Calhoun CZO - Soil Texture - Argillic Horizon (2016-2017)
1 components    Calhoun CZO Research Area 2, Calhoun CZO Research Area 3, Calhoun CZO Research Area 4    Soil Science / Pedology    Ryland, Rachel C.


Calhoun CZO Research Area 2

.16 km2,

Research area 2 is located in the northwestern section of the Calhoun Experimental Forest off Bombing Range Road. It includes a small hardwood stand and an adjacent pine stand.

Calhoun Critical Zone Observatory - Soil Moisture - Saturated Hydraulic Conductivity (Ksat) (2017)
2 components    Calhoun CZO Research Area 2, Calhoun CZO Research Area 3    Soil Science / Pedology    Ryland, Rachel; Markewitz, Daniel; Sutter, Lori

Calhoun CZO - Vegetation - Litterfall (2014-2017)
1 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 2, Calhoun CZO Research Area 3, Calhoun CZO Research Area 4, Calhoun CZO Research Area 5    Biology / Ecology    Cook, Charles W.; O'Neill, K. P.; Richter, Daniel deB.

Calhoun CZO - Soil Biogeochemistry (2015-2016)
1 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 2, Calhoun CZO Research Area 7, Calhoun CZO Research Area 8    Biogeochemistry, Biology / Ecology, Soil Science / Pedology    Sharon Billings; Christoph Lehmeier; Kyungjin Min; Samik Bagchi; Emma Hauser; Keelan Barger; Samantha Elledge; Rebecca Flournoy; Carl Heroneme; Hanna Rankin; Rena Stair

Calhoun CZO - Photographic Imagery, Soil Survey - Soil Pit Profiles (2016)
4 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 2, Calhoun CZO Research Area 7, Calhoun CZO Research Area 8    Soil Science / Pedology    Cook, Charles W.

Calhoun CZO - Soil Geochemistry (2016)
1 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 2, Calhoun CZO Research Area 6, Calhoun CZO Research Area 7, Calhoun CZO Research Area 8    Geochemistry / Mineralogy    Austin, Jason C.; Schroeder, Paul A.

Calhoun CZO - Soil Texture - Argillic Horizon (2016-2017)
1 components    Calhoun CZO Research Area 2, Calhoun CZO Research Area 3, Calhoun CZO Research Area 4    Soil Science / Pedology    Ryland, Rachel C.


Calhoun CZO Research Area 4

0.42 km2,

One of four historic Calhoun experimental catchments, which were instrumented with precipitation and runoff gauges from the 1940s to 1960s. The catchment was severely eroded and gullied and has been reforested over the last half century. The archived hydrologic records and photographs have been stored in the Coweeta Hydrologic Laboratory data vault since 1962. Contemporary hydrologic responses of the catchments will be compared with the historical data.

Calhoun Critical Zone Observatory - Soil Moisture - Hydroprobe (2016-2018)
1 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 4, Calhoun CZO Research Area 7    Hydrology, Biogeochemistry, Soil Science / Pedology    Austin, Jason C.; Brecheisen, Zachary S.; Cook, Charles W.; Heine, Paul R.; Richter, Daniel deB.

Calhoun CZO - LiDAR - Hyperspectral and LiDAR Survey (2014)
1 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 4, Calhoun Experimental Forest and Eco-hydrology Experiments, Calhoun Long-Term Soil-Ecosystem Plots and Reference Areas    GIS / Remote Sensing    National Center for Airborne Laser Mapping

Calhoun CZO - Vegetation - Leaf Area Index (2014)
1 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 4, Calhoun Experimental Forest and Eco-hydrology Experiments    Biology / Ecology    Cook, Charles W.

Calhoun CZO - Soil Survey - Soil Texture (2014-2015)
3 components    Calhoun CZO Research Area 3, Calhoun CZO Research Area 4    Soil Science / Pedology    Heine, Paul

Calhoun CZO - Vegetation - Litterfall (2014-2017)
1 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 2, Calhoun CZO Research Area 3, Calhoun CZO Research Area 4, Calhoun CZO Research Area 5    Biology / Ecology    Cook, Charles W.; O'Neill, K. P.; Richter, Daniel deB.

Calhoun CZO - Soil Texture (2015-2016)
1 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 4, Calhoun CZO Research Area 7    Soil Science / Pedology    Heine, Paul R

Calhoun CZO - Soil Porosity, Soil Invertebrates (2015-2017)
2 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 4, Calhoun CZO Research Area 7    Soil Science / Pedology, Biology / Ecology    Brecheisen, Zachary S..; Callaham, M.A.; Heine, P.R.; Cook, Charles W.; Richter, Daniel deB.

Calhoun CZO - LiDAR - LiDAR Leaf-Off Survey (2016)
1 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 4, Calhoun Experimental Forest and Eco-hydrology Experiments, Calhoun Long-Term Soil-Ecosystem Plots and Reference Areas    GIS / Remote Sensing    National Center for Airborne Laser Mapping

Calhoun CZO - Soil Texture - Argillic Horizon (2016-2017)
1 components    Calhoun CZO Research Area 2, Calhoun CZO Research Area 3, Calhoun CZO Research Area 4    Soil Science / Pedology    Ryland, Rachel C.

Research areas 1, 4, 7 - Soil Gas (2015-2017)
2 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 4, Calhoun CZO Research Area 7    Biogeochemistry, Soil Science / Pedology    Brecheisen, Z. S.; Cook, Charles W.; Richter, Daniel deB.


Calhoun CZO Research Area 1

0.40 km2, 180-190 m elevation, 16 °C, 1250 mm/yr

The largest of the research areas at the Calhoun, this includes three major subsections: (1) the Calhoun Long-Term Soil-Ecosystem Plots and Reference Areas, (2) the "tower site" (site of future flux tower and clearcut treatment), and (3) the "dove field", which to our knowledge has been continuously cultivated since at least the 1930s. Also included in Research Area 1 is a 70-m deep well in a cow pasture on private land adjacent to the long-term plots.

Calhoun 70-m deep well - Groundwater Depth, Electrical Conductivity (2014-2017)
2 components    Calhoun CZO Research Area 1    Hydrology    Mallard, John; McGlynn, Brian

Calhoun 70-m deep well - Soil Mineralogy, Soil Geochemistry, Photographic Imagery (2019)
4 components    Calhoun CZO Research Area 1    Geochemistry / Mineralogy, Soil Science / Pedology    Austin, Jason C.; Bacon, Allan R.; Richter, Daniel deB.; Schroeder, Paul A.

Calhoun Critical Zone Observatory - Soil Moisture - Hydroprobe (2016-2018)
1 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 4, Calhoun CZO Research Area 7    Hydrology, Biogeochemistry, Soil Science / Pedology    Austin, Jason C.; Brecheisen, Zachary S.; Cook, Charles W.; Heine, Paul R.; Richter, Daniel deB.

Calhoun CZO - LiDAR - Hyperspectral and LiDAR Survey (2014)
1 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 4, Calhoun Experimental Forest and Eco-hydrology Experiments, Calhoun Long-Term Soil-Ecosystem Plots and Reference Areas    GIS / Remote Sensing    National Center for Airborne Laser Mapping

Calhoun CZO - Vegetation - Leaf Area Index (2014)
1 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 4, Calhoun Experimental Forest and Eco-hydrology Experiments    Biology / Ecology    Cook, Charles W.

Calhoun CZO - Precipitation (2014-2017)
1 components    Calhoun CZO Research Area 1    Climatology / Meteorology, Hydrology    Mallard, John M.

Calhoun CZO - Vegetation - Litterfall (2014-2017)
1 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 2, Calhoun CZO Research Area 3, Calhoun CZO Research Area 4, Calhoun CZO Research Area 5    Biology / Ecology    Cook, Charles W.; O'Neill, K. P.; Richter, Daniel deB.

Calhoun CZO - Soil Biogeochemistry (2015-2016)
1 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 2, Calhoun CZO Research Area 7, Calhoun CZO Research Area 8    Biogeochemistry, Biology / Ecology, Soil Science / Pedology    Sharon Billings; Christoph Lehmeier; Kyungjin Min; Samik Bagchi; Emma Hauser; Keelan Barger; Samantha Elledge; Rebecca Flournoy; Carl Heroneme; Hanna Rankin; Rena Stair

Calhoun CZO - Soil Texture (2015-2016)
1 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 4, Calhoun CZO Research Area 7    Soil Science / Pedology    Heine, Paul R

Calhoun CZO - Soil Porosity, Soil Invertebrates (2015-2017)
2 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 4, Calhoun CZO Research Area 7    Soil Science / Pedology, Biology / Ecology    Brecheisen, Zachary S..; Callaham, M.A.; Heine, P.R.; Cook, Charles W.; Richter, Daniel deB.

Calhoun CZO - LiDAR - LiDAR Leaf-Off Survey (2016)
1 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 4, Calhoun Experimental Forest and Eco-hydrology Experiments, Calhoun Long-Term Soil-Ecosystem Plots and Reference Areas    GIS / Remote Sensing    National Center for Airborne Laser Mapping

Calhoun CZO - Photographic Imagery, Soil Survey - Soil Pit Profiles (2016)
4 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 2, Calhoun CZO Research Area 7, Calhoun CZO Research Area 8    Soil Science / Pedology    Cook, Charles W.

Calhoun CZO - Soil Geochemistry (2016)
1 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 2, Calhoun CZO Research Area 6, Calhoun CZO Research Area 7, Calhoun CZO Research Area 8    Geochemistry / Mineralogy    Austin, Jason C.; Schroeder, Paul A.

Calhoun CZO Research Area 1 - Flux Tower - Young Pine Forest (2016-2017)
4 components    Calhoun Long-Term Soil-Ecosystem Plots and Reference Areas, Calhoun CZO Research Area 1    Climatology / Meteorology    Yao Tang; Jingfeng Wang

National - Soil Gas - CO2 and O2 (2014-2017)
2 components    Bigelow Site (High-Elevation), Jemez 2013 Burned ZOB, Jemez Unburned Site, Calhoun CZO Research Area 1, Garner Run - Sandstone Forested, Northeastern Puerto Rico and the Luquillo Mountains    Biogeochemistry, Climatology / Meteorology, Soil Science / Pedology, Biology / Ecology    Brecheisen, Zachary; Brecheisen, Jon; Brecheisen, Jason; Silver, Whendee; Abramson, Nate; Abramson, Greg; Condon, Katherine E.; Cook, Charles W.; Hill, Lillian; Losleben, Mark; Minor, Rebecca; O'Connell, Christine; Richter, Daniel deB.; Durcik, Matej

R1 - Soil Biogeochemistry - Carbon isotopes (2016)
1 components    Calhoun CZO Research Area 1    Soil Science / Pedology, Biogeochemistry    Cherkinsky, Alexander

Research area 1 - Soil Gas, Soil Moisture, Soil Temperature (2016-2019)
1 components    Calhoun CZO Research Area 1    Biogeochemistry, Soil Science / Pedology, Hydrology    Brecheisen, Z. S.; Cook, Charles W.; Richter, Daniel deB.

Research areas 1, 4, 7 - Soil Gas (2015-2017)
2 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 4, Calhoun CZO Research Area 7    Biogeochemistry, Soil Science / Pedology    Brecheisen, Z. S.; Cook, Charles W.; Richter, Daniel deB.


Calhoun Pine Flux Tower

16 °C, 1250 mm/yr

In 2016 a 30 foot tall flux tower was installed in a young pine stand in research area 1. The heavily instrumented tower is complemented with gas well going down to 5-m below the soil surface.


Calhoun Long-Term Soil-Ecosystem Plots and Reference Areas

180-190 m elevation, 16 °C, 1250 mm/yr

The Calhoun LTSE has 16 permanent plots installed on the site of two former cotton fields planted to loblolly pine (P. taeda) in the winter of 1956-1957. From 1962 to present, the soil has been sampled to a depth of 60 cm approximately every 5 years. In 2007, 8 of the 16 plots were logged to initiate a new phase in the long-term experiment. Plot studies in the Calhoun CZO also include reference hardwoods, secondary pine, hay, and cultivated crops. Source: D. Richter, 2001.

Calhoun 70m deep well - Soil Geochemistry (2010)
1 components    Calhoun Long-Term Soil-Ecosystem Plots and Reference Areas    Soil Science / Pedology, Geochemistry / Mineralogy    Bacon, Allan R; Richter, Daniel deB.; Bierman, Paul R.; Rood, Dylan H.

Calhoun CZO - LiDAR - Hyperspectral and LiDAR Survey (2014)
1 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 4, Calhoun Experimental Forest and Eco-hydrology Experiments, Calhoun Long-Term Soil-Ecosystem Plots and Reference Areas    GIS / Remote Sensing    National Center for Airborne Laser Mapping

Calhoun CZO - Soil Mineralogy (2014-2015)
1 components    Calhoun Long-Term Soil-Ecosystem Plots and Reference Areas    Soil Science / Pedology    Austin, Jason C.

Calhoun CZO - Vegetation - Tree Survey (2014-2017)
1 components    Calhoun Experimental Forest and Eco-hydrology Experiments, Calhoun Long-Term Soil-Ecosystem Plots and Reference Areas    Biology / Ecology    Cook, Charles W.; Brecheisen, Z.; Richter, Daniel deB.

Calhoun CZO - LiDAR - LiDAR features for the Calhoun CZO forest plots (2015)
1 components    Calhoun Experimental Forest and Eco-hydrology Experiments, Calhoun Long-Term Soil-Ecosystem Plots and Reference Areas    GIS / Remote Sensing    Majasalmi, Titta

Calhoun CZO - Soil Geochemistry - Mössbauer spectroscopy (2015)
1 components    Calhoun Long-Term Soil-Ecosystem Plots and Reference Areas    Biogeochemistry, Soil Science / Pedology    Thompson, Aaron; Richter, Daniel deB.; Wilmoth, Jared; Barcellos, Diego

Calhoun CZO - Soil Geochemistry - Soil organic matter transformations (2015)
1 components    Calhoun Long-Term Soil-Ecosystem Plots and Reference Areas    Biogeochemistry, Biology / Ecology, Soil Science / Pedology    Min, K.; Flournoy, R.; Heroneme, C.; Barger, K.; Lehmeier, C.A.; Heine, P.; Richter, Daniel deB.; Billings, S.A.

Calhoun CZO - LiDAR - LiDAR Leaf-Off Survey (2016)
1 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 4, Calhoun Experimental Forest and Eco-hydrology Experiments, Calhoun Long-Term Soil-Ecosystem Plots and Reference Areas    GIS / Remote Sensing    National Center for Airborne Laser Mapping

Calhoun CZO Research Area 1 - Flux Tower - Young Pine Forest (2016-2017)
4 components    Calhoun Long-Term Soil-Ecosystem Plots and Reference Areas, Calhoun CZO Research Area 1    Climatology / Meteorology    Yao Tang; Jingfeng Wang

Calhoun Experimental Forest, SC - GIS/Map Data, Photographic Imagery - 1933 aerial imagery composite (1933)
2 components    Calhoun Experimental Forest and Eco-hydrology Experiments, Calhoun Long-Term Soil-Ecosystem Plots and Reference Areas    GIS / Remote Sensing    Brecheisen, Zachary S.; Cook, Charles W.; Harmon, M.A.

Calhoun Long Term Soil Experiment - Soil Gas (1992-1996)
1 components    Calhoun Long-Term Soil-Ecosystem Plots and Reference Areas    Soil Science / Pedology, Biogeochemistry    Markewitz, Daniel; Richter, Daniel deB.

Calhoun Long-Term Soil Experiment - Soil Water Chemistry (1991-1994)
1 components    Calhoun Long-Term Soil-Ecosystem Plots and Reference Areas    Soil Science / Pedology, Water Chemistry    Markewitz, Daniel; Richter, Daniel deB.

Calhoun Long-Term Soil Experiment - Soil Moisture (1991-1995)
1 components    Calhoun Long-Term Soil-Ecosystem Plots and Reference Areas    Soil Science / Pedology, Hydrology    Markewitz, D.; Richter, Daniel deB.

Calhoun Long-Term Soil Experiment - Soil Geochemistry - 70-m deep borehole (2010)
1 components    Calhoun Long-Term Soil-Ecosystem Plots and Reference Areas    Biogeochemistry, Geochemistry / Mineralogy, Soil Science / Pedology    Bacon, A.R.; Richter, Daniel deB.

Calhoun Long-Term Soil Experiment - Soil Survey - Hydraulic Conductivity (2011)
1 components    Calhoun Long-Term Soil-Ecosystem Plots and Reference Areas    Soil Science / Pedology, Hydrology    Brewington, M. Lance; Richter, Daniel deB.

Union County, SC - Land Use History - Agriculture Census (1950)
1 components    Calhoun Long-Term Soil-Ecosystem Plots and Reference Areas    Social Science    Giesen, James C.


Calhoun Experimental Forest and Eco-hydrology Experiments

134-157 m elevation, 16 °C, 1250 mm/yr

Three historic Calhoun experimental catchments are being re- and up-instrumented based on precipitation and runoff gauging from the 1940s to 1960s. The catchments were severely eroded and gullied and have been reforested over the last half century. The archived hydrologic records were stored in the Coweeta Hydrologic Laboratory data vault since 1962. Contemporary hydrologic responses of the catchments will be compared with those that are historic. The three experimental catchments reside within the much larger Holcombe's Branch, a tributary of the Tyger River. The Holcombe's Branch basin will be used to examine the erosion's interactions with soil carbon gains and losses.

Calhoun CZO - LiDAR - Hyperspectral and LiDAR Survey (2014)
1 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 4, Calhoun Experimental Forest and Eco-hydrology Experiments, Calhoun Long-Term Soil-Ecosystem Plots and Reference Areas    GIS / Remote Sensing    National Center for Airborne Laser Mapping

Calhoun CZO - Vegetation - Leaf Area Index (2014)
1 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 4, Calhoun Experimental Forest and Eco-hydrology Experiments    Biology / Ecology    Cook, Charles W.

Calhoun CZO - Streamflow / Discharge (2014-2017)
1 components    Calhoun Experimental Forest and Eco-hydrology Experiments, Calhoun CZO Research Area 3    Hydrology    Mallard, John McDevitt

Calhoun CZO - Vegetation - Tree Survey (2014-2017)
1 components    Calhoun Experimental Forest and Eco-hydrology Experiments, Calhoun Long-Term Soil-Ecosystem Plots and Reference Areas    Biology / Ecology    Cook, Charles W.; Brecheisen, Z.; Richter, Daniel deB.

Calhoun CZO - Stream Water Chemistry (2014-2018)
2 components    Calhoun Experimental Forest and Eco-hydrology Experiments    Water Chemistry    Foroughi, M.; Cook, Charles W.; Heine, P.; Richter, Daniel deB.

Calhoun CZO - LiDAR - LiDAR features for the Calhoun CZO forest plots (2015)
1 components    Calhoun Experimental Forest and Eco-hydrology Experiments, Calhoun Long-Term Soil-Ecosystem Plots and Reference Areas    GIS / Remote Sensing    Majasalmi, Titta

Calhoun CZO - LiDAR - LiDAR Leaf-Off Survey (2016)
1 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 4, Calhoun Experimental Forest and Eco-hydrology Experiments, Calhoun Long-Term Soil-Ecosystem Plots and Reference Areas    GIS / Remote Sensing    National Center for Airborne Laser Mapping

Calhoun Experimental Forest, SC - Land Use History, Photographic Imagery (1932-1987)
1 components    Calhoun Experimental Forest and Eco-hydrology Experiments    Outreach / Education Research, Social Science    Nelson, Donald R.; O'Neill, Katherine P.; Coughlan, Michael R.; Lonneman, Michael C.; Meyers, Zachary; U.S. Department of Agriculture; Forest Service

Calhoun Experimental Forest, SC - GIS/Map Data, Photographic Imagery - 1933 aerial imagery composite (1933)
2 components    Calhoun Experimental Forest and Eco-hydrology Experiments, Calhoun Long-Term Soil-Ecosystem Plots and Reference Areas    GIS / Remote Sensing    Brecheisen, Zachary S.; Cook, Charles W.; Harmon, M.A.

Calhoun Experimental Forest, SC - Streamflow / Discharge, Precipitation (1949-1962)
1 components    Calhoun Experimental Forest and Eco-hydrology Experiments    Hydrology, Climatology / Meteorology    Jingfeng Wang; Yawen Shen; Sabina Shahnaz

Calhoun Experimental Watershed 4 - Soil Electrical Resistivity (2015)
1 components    Calhoun Experimental Forest and Eco-hydrology Experiments    Geophysics    Daniel Markewitz

Calhoun Experimental Watershed 4 - Streamflow / Discharge, Electrical Conductivity (2015)
2 components    Calhoun Experimental Forest and Eco-hydrology Experiments    Hydrology    Mallard, John; McGlynn, Brian

Calhoun Experimental Watersheds 2, 3, 4 - Soil Moisture, Soil Redox Potential (2014-2015)
1 components    Calhoun Experimental Forest and Eco-hydrology Experiments    Biogeochemistry, Soil Science / Pedology    Caitlin Hodges; Daniel Markewitz; Aaron Thompson

Research area 3 - Groundwater Depth - 5 minute resolution (2014-2015)
1 components    Calhoun Experimental Forest and Eco-hydrology Experiments    Hydrology    Mallard, John; McGlynn, Brian

Data Use Policy
Data Sharing Policy
  • Data Use Policy

    DRAFT v.0.4.0

    1. Use our data freely. All CZO Data Products* except those labelled Private** are released to the public and may be freely copied, distributed, edited, remixed, and built upon under the condition that you give acknowledgement as described below. Non-CZO data products — like those produced by USGS or NOAA — have their own use policies, which should be followed.

    2. Give proper citation and acknowledgement. Publications, models and data products that make use of these datasets must include proper citation and acknowledgement. Most importantly, provide a citation in a similar way as a journal article (i.e. author, title, year of publication, name of CZO “publisher”, edition or version, and URL or DOI access information. See http://www.datacite.org/whycitedata). Also include at least a brief acknowledgement such as: “Data were provided by the NSF-supported Southern Sierra Critical Zone Observatory” (replace with the appropriate observatory name).

    3. Let us know how you will use the data. The dataset creators would appreciate hearing of any plans to use the dataset. Consider consultation or collaboration with dataset creators.

    *CZO Data Products.  Defined as a data collected with any monetary or logistical support from a CZO.

    **Private. Most private data will be released to the public within 1-2 years, with some exceptionally challenging datasets up to 4 years. To inquire about potential earlier use, please contact us.

  • Data Sharing Policy

    DRAFT v.0.2.5

    All CZO investigators and collaborators who receive material or logistical support from a CZO agree to:

    1. Share data privately within 1 year. CZO investigators and collaborators agree to provide CZO Data Products* — including data files and metadata for raw, quality controlled and/or derived data — to CZO data managers within one year of collection of samples, in situ or experimental data. By default, data values will be held in a Private CZO Repository**, but metadata will be made public and will provide full attribution to the Dataset Creators†.

    2. Release data to public within 2 years. CZO Dataset Creators will be encouraged after one year to release data for public access. Dataset Creators may chose to publish or release data sooner.

    3. Request, in writing, data privacy up to 4 years. CZO PIs will review short written applications to extend data privacy beyond 2 years and up to 4 years from time of collection. Extensions beyond 3 years should not be the norm, and will be granted only for compelling cases.

    4. Consult with creators of private CZO datasets prior to use. In order to enable the collaborative vision of the CZO program, data in private CZO repositories will be available to other investigators and collaborators within that CZO. Releasing or publishing any derivative of such private data without explicit consent from the dataset creators will be considered a serious scientific ethics violation.

    * CZO Data Products. Defined as data collected with any monetary or logistical support from a CZO. Logistical support includes the use of any CZO sensors, sampling infrastructure, equipment, vehicles, or labor from a supported investigator, student or staff person. CZO Data Products can acknowledge multiple additional sources of support.

    ** Private CZO Repository. Defined as a password-protected directory on each CZO’s data server. Files will be accessible by all investigators and collaborators within the given CZO and logins will be maintained by that local CZO’s data managers. Although data values will not be accessible by the public or ingested into any central data system (i.e. CUAHSI HIS), metadata will be fully discoverable by the public. This provides the dual benefit of giving attribution and credit to dataset creators and the CZO in general, while maintaining protection of intellectual property while publications are pending.

    † Dataset Creators. Defined as the people who are responsible for designing, collecting, analyzing and providing quality assurance for a dataset. The creators of a dataset are analogous to the authors of a publication, and datasets should be cited in an analogous manner following the emerging international guidelines described at http://www.datacite.org/whycitedata.

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Explore Further