Most of the world’s terrestrial carbon is found in the critical zone, where it is predominantly stored as soil carbon. This important carbon reservoir is sensitive to climatic and land use change and may act as a source or sink for atmospheric carbon dioxide. Despite its importance, soil carbon remains a critical source of uncertainty in both carbon cycling and global climate models. That uncertainty arises due to both an incomplete understanding of the processes dictating soil carbon fate and the challenge of up-scaling often highly spatially and temporally heterogeneous soil processes to the landscape or global level.
Reynolds Creek Experimental Watershed in Owyhee County, Idaho is particularly well suited for this effort because it extends over strong gradients in climate and vegetation with associated dramatic differences in both soil organic and inorganic carbon. These gradients facilitate both observation-based science and experimental investigations in which the gradients act as primary variables. This new CZO is also be supported by unique long-term, spatially- extensive, meteorological, soil monitoring, and atmospheric datasets developed and maintained by our main partner, the USDA Agricultural Research Service (ARS), that will both inform and constrain conceptual and numerical models of soil carbon behavior.
30 Oct 2017 - Water Resources Research published a new special collection in September 2017 featuring concentration-discharge research from multiple CZOs.
21 Apr 2017 - AGU has published a collection of commentaries highlighting the important role Earth and space science research plays in society.
06 Apr 2017 - 2017 CZO Webinar Series: Critical Zone and Society.
14 Sep 2016 - Reynolds Creek CZO is hosting a PI meeting September 18th to the 21st is Boise, Idaho. ...
22 Aug 2016 - The Physiological Ecology Section is pleased to announce the 2016 merit award winners for their presentations at the ESA meeting in Ft. Lauderdale.
09 Feb 2016 - Students dig a soil pit in Johnston Draw, Reynolds Creek Experimental Watershed. They made a time-lapse video during the early part of their work.
17 Jul 2015 - An Organized Session On Critical Zone Ecology At The 100th Annual Meeting Of The Ecological Society Of America August 9-14, 2015 In Baltimore, Md.
22 Nov 2016 - CZOs at AGU 2016: Agenda and award recipients
19 Oct 2016 - University of Nevada Reno's Adrian Harpold reflects on his past and present time researching at Critical Zone Observatories.
04 Dec 2015 - Taking the Pulse of the Earth's Surface Systems In September of 2014, Laurel Larsen (UC Berkley), Elizabeth Hajek (Penn State), and others...
17 Aug 2015 - Members of AGU and the Ecological Society of America came together in their first joint event to discuss opportunities for research collaboration.
16 Jul 2015 - A session entitled 'Ecology in the Critical Zone" will take place at the Ecological Society of America (ESA) 2015 Meeting held from August...
Growing new generations of critical zone scientists. Wymore Adam S., Nicole R. West, Kate Maher, Pamela L. Sullivan, Adrian Harpold, Diana Karwan, Jill A. Marshall, Julia Perdrial, Daniella M. Rempe and Lin Ma (2017): Earth Surface Processes and Landforms Cross-CZO National
Regional sensitivities of seasonal snowpack to elevation, aspect, and vegetation cover in western North America. Christopher J. Tennant, Adrian A. Harpold, Kathleen Ann Lohse, Sarah E. Godsey, Benjamin T. Crosby, Laurel G. Larsen, Paul D. Brooks, Robert W. Van Kirk, Nancy F. Glenn (2017): Water Resources Research 53 Cross-CZO National
Geochemical evolution of the Critical Zone across variable time scales informs concentration-discharge relationships: Jemez River Basin Critical Zone Observatory. McIntosh J.C., Schaumberg C., Perdrial J., Harpold A., Vázquez-Ortega A., Rasmussen C., Vinson D., Zapata-Rios X., Brooks P.D., Meixner T., Pelletier J., Derry L., Chorover J. (2017): Water Resources Research 53(5): 4169–4196 Cross-CZO National
Hydrological partitioning in the critical zone: Recent advances and opportunities for developing transferable understanding of water cycle dynamics. Brooks P.D., Chorover J., Fan Y., Godsey S.E., Maxwell R.M., McNamara J.P., and Tague C. (2015): Water Resources Research 51 (9): 6973-6987 Cross-CZO
A field comparison of multiple techniques to quantify groundwater–surface-water interactions. González-Pinzón, R., Ward, A., Hatch, C., Wlostowski, A., Singha, K., Gooseff, M., Haggerty, R., Harvey, J., Cirpka, O., and Brock, J. (2015): Freshwater Science, 34(1) Cross-CZO
Analytical model for flow duration curves in seasonally dry climates. Müller, M.F., Dralle, D.N., and Thompson, S.E. (2014): Water Resources Research 50(7): 5510-5531. Cross-CZO
Technical report: the design and evaluation of a basin-scale wireless sensor network for mountain hydrology. Zhang, Z., Glaser, S., Bales, R., Conklin, M., Rice, R., and D. Marks (2017): Water Resources Research, 53. 4487–4498.
Water and Carbon Fluxes along a Climate Gradient in Sagebrush Ecosystems. Flerchinger, G.N., Fellows, A.W., Seyfried, M.S., Clark, P.E., Lohse, K.A. (2017): Agricultural and Forest Meteorology
Variation in carbon and water fluxes in sagebrush steppe communities along an elevation gradient spanning rain- to snow- dominated precipitation regimes . Sharma, H., K. Reinhardt, K. A. Lohse, K. Aho (2017): Agriculture and Forest Meteorology
Nitrogenase Activity by Biological Soil Crusts in Cold Sagebrush Steppe Ecosystems. Schwabedissen, S.G., Lohse, K.A., Reed, S.C., Aho, K.A., T.S. Magnuson (2017): Biogeochemistry 134 (1–2): 57–76
On the rocks: quantifying storage of inorganic soil carbon on gravels and determining pedon-scale variability. Stanbery, C.J., Pierce, J.L., Benner, S.G., and K. Lohse (2017): Catena 157: 436-442
Variation in Biological Soil Crust Bacterial Abundance and Diversity as a Function of Climate in Cold Steppe Ecosystems in the Intermountain West, USA. Blay, E.S., Schwabedissen, S.G., Magnuson, T.S., Aho, K., Sheridan, P.P., and K.A. Lohse (2017): Microbial Ecology 74 (3): 691–700
Regional sensitivities of seasonal snowpack to elevation, aspect, and vegetation cover in western North America. Tennant, C.J., Harpold, A.A., Lohse, K.A., Godsey, S.E., Crosby, B.T., Larsen, L.G., Brooks, P.D., R.W. Van Kirk, N. Glenn (2017): Water Resources Research 53: doi:10.1002/2016WR019374 Cross-CZO National