News

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Earth Science Week 2017 Video Contest

15 Aug 2017 - For Earth Science Week 2017, the American Geosciences Institute invites you to enter the Earth Connections video contest. Submit a brief, 30-90...

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NSF News Release: What’s killing trees during droughts? Scientists have new answers.

14 Aug 2017 - Researchers find that carbon starvation and hydraulic failure kill drought-stricken trees.

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CZNews: Summer 2017

27 Jul 2017 - CZO National Office's quarterly newsletter CZNews: Summer 2017.

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AGU Horton Research Grant Award

03 Jul 2017 - Ravindra Dwivedi received the prestigious 2017 AGU Horton Research Grant to support his CZO work in the Santa Catalina Mountains.

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Undergraduate course curriculum, “Introduction to Critical Zone Science,” available free online

23 Jun 2017 - A 15-week semester-long upper-level undergraduate course curriculum entitled “Introduction to Critical Zone Science” is now available free online.

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Contribute a classroom/field activity to NAGT’s Teach the Earth

22 May 2017 - Contribute a classroom or field activity to Teach the Earth.

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The frontier beneath our feet — an AGU commentary on the critical zone

21 Apr 2017 - AGU has published a collection of commentaries highlighting the important role Earth and space science research plays in society.

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2017 CZO Webinar Series: Critical Zone and Society

06 Apr 2017 - 2017 CZO Webinar Series: Critical Zone and Society.

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K-12 Soil Science Teacher Resources

24 Mar 2017 - The Soil Science Society of America (SSSA) is a professional scientific society, made up of soil scientists, educators, and consultants focused on...

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Harman Receives 2016 Early Career Hydrologic Science Award

19 Oct 2016 - Ciaran Harman will receive the 2016 Early Career Hydrologic Science Award at the 2016 AGU Fall Meeting, to be held 12–16 December in San Francisco.

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CZ Science Cafe Series: Soil in the Critical Zone

12 Aug 2016 - Dr. Craig Rasmussen, hydrologist from the University of Arizona, Department of Hydrology and Water Resources, gives the second Cafe presentation in...

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CZ Science Cafe Series: Soil Microbes in the Critical Zone

12 Aug 2016 - Dr. Rachel Gallery, an assistant professor in the School of Natural Resources and the Environment at the University of Arizona, gives a Cafe...

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CZ Science Cafe Series: Water in the Critical Zone

12 Aug 2016 - Dr. Tom Meixner, a hydrologist in the Department of Hydrology and Water Resources at the University of Arizona, gives the second Cafe presentation...

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Critical Technology for a Changing World

15 Jun 2016 - In 2014, students of a CyVerse (then iPlant Collaborative) course called Applied Concepts in Cyberinfrastructure, taught at the University of...

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Post-Wildfire Erosion Can Sculpt Forested Mountains

19 Apr 2016 - Researchers from the UA Santa Catalina Mountains & Jemez River Basin Critical Zone Observatory did before-and-after studies of how severe...

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EOS: Bark Beetles Cause Big Tree Die-Offs, but Streams Flow Steadily

10 Mar 2016 - EOS article written by Lily Strelich features research conducted by CZO investigators and their colleagues, which shows that bark beetle epidemics...

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The 2016 MG Anderson Award

03 Mar 2016 - The 2016 MG Anderson Award for Outstanding Paper in Hydrological Processes, Wiley is presented to Jemez-Catalina CZO investigators.

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EOS Opinion: Understanding Ecosystem Services from a Geosciences Perspective

22 Jan 2016 - Assessment of ecosystem services can be improved by including broader spatial and temporal scales of geosciences perspectives.

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CZ Science Cafe Series: Introduction to the Critical Zone

10 Nov 2015 - Dr. Jon Chorover explains the basic concept of the Critical Zone and the earth science during the first Cafe presentation in the Critical Zone...

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Mt. Lemmon Science Tour App

04 Nov 2015 - This app is designed to accompany a drive up the Catalina Highway and it describes a wide range of sky island science, including some of that done...

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Forests Worldwide Vulnerable to Drought, UA Researcher Says

28 Aug 2015 - David Breshears was interviewed by Sara Hammond about forest vulnerability to growing risks of drought and heat-induced die-off. Read and listen...

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Jon Chorover to speak at international workshop on hydro-biogeochemical processes

16 Jul 2015 - Jon Chorover of the Santa Catalina Mountains & Jemez River Basin CZO has been invited to talk at the Hydro-Biogeochemical Processes: Mechanisms,...

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Soil, Not Dirt: A Digital Journey Connecting Soils, Plants, and Climate by Rebecca Lybrand

08 Jun 2015 - Join Rebecca on an exciting GoPro adventure to study soil in the desert, grasslands, and pine forests of Arizona.

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Critical Zone Profiles - Meet the people doing CZO science (Catalina-Jemez CZO)

19 Mar 2015 - Get a sense of the people and the work. Several members of the Catalina-Jemez CZO are profiled here, including students and professors.

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Critical Zone Services: Expanding Context, Constraints, and Currency beyond Ecosystem Services

10 Feb 2015 - Critical Zone Services: Expanding Context, Constraints, and Currency beyond Ecosystem Services

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Predicting post-wildfire erosion better

08 Dec 2014 - Jon Pelletier and his graduate student Caitlin Orem's research on the post Las Conchas fire erosion was highlighed in the Arizona Daily Star...


CZOs at AGU 2016

22 Nov 2016 - CZOs at AGU 2016: Agenda and award recipients

Critical Zone Q&A with researcher Adrian Harpold

19 Oct 2016 - University of Nevada Reno's Adrian Harpold reflects on his past and present time researching at Critical Zone Observatories.

EOS: Taking the Pulse of the Earth’s Surface Systems

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...

Joint AGU-ESA Event Brings Together Collaborative Networks

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.

CZO Ecology Session at ESA 2015 Meeting

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...

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Events

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AGU Fall Meeting 2017

American Geophysical Union


New Orleans, Louisiana .


Fall 2017 CZO Meetings

Fall 2017 Catalina-Jemez CZO Meetings


Marshall 531.

Fall 2017 CZO Meetings

Fall 2017 Catalina-Jemez CZO Meetings


Marshall 531.

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Publications

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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

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Soil organic carbon partitioning and Δ14C variation in desert and conifer ecosystems of southern Arizona. Lybrand R.A., Heckman K., and Rasmussen C. (2017): Biogeochemistry 134(3): 261-277

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Impacts of hydraulic redistribution on grass–tree competition vs facilitation in a semi-arid savanna. Barron-Gafford G.A., Sanchez-Cañete E.P., Minor R.L., Hendryx S.M., Lee E., Sutter L.F., Tran N., Parra E., Colella T., Murphy P.C., Hamerlynck E.P., Kumar P. and Scott R.L. (2017): New Phytologist 215(4): 1451–1461 Cross-CZO

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A multi-species synthesis of physiological mechanisms in drought-induced tree mortality. Adams H.D., Zeppel M.J.B., Anderegg W.R.L., Hartmann H., Landhausser S.M., Tissue D.T., Huxman T.E., Hudson P.J., Franz T.E., Allen C.D., Anderegg L.D.L., Barron-Gafford G.A., Beerling D.J., Breshears D.D., Brodribb T.J., Bugmann H., Cobb R.C., Collins A.D., Dickman L.T., Duan H., Ewers B.E., Galiano L., Galvez D.A., Garcia-Forner N., Gaylord M.L., Germino M.J., Gessler A., Hacke U.G., Hakamada R., Hector A., Jenkins M.W., Kane J.M., Kolb T.E., Law D.J., Lewis J.D., Limousin J-M., Love D.M., Macalady A.K., Marti­nez-Vilalta J., Mencuccini M., Mitchell P.J., Muss J.D., O'Brien M.J., O'Grady A.P., Pangle R.E., Pinkard E.A., Piper F.I., Plaut J.A., Pockman W.T., Quirk J., Reinhardt K., Ripullone F., Ryan M.G., Sala A., Sevanto S., Sperry J.S., Vargas R., Vennetier M., Way D.A., Xu C., Yepez E.A., and McDowell N.G. (2017): Nature Ecology & Evolution 1: 1285–1291

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Asymmetry of weathering-limited hillslopes: the importance of diurnal covariation in solar insolation and temperature. Pelletier J.D. and Swetnam T.L. (2017): Earth Surface Processes and Landforms 42(9): 1408–1418

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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

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Coevolution of soil and topography across a semiarid cinder cone chronosequence. Rasmussen C., McGuire L., Dhakal P., Pelletier J.D. (2017): CATENA 156: 338-352

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Topographically driven differences in energy and water constrain climatic control on forest carbon sequestration. Swetnam T.L., Brooks P.D., Barnard H.R., Harpold A.A., and Gallo E.L. (2017): Ecosphere 8(4): e01797 Cross-CZO

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Improving the accuracy of the gradient method for determining soil carbon dioxide efflux. Sánchez-Cañete E.P., Scott R.L., van Haren J., and Barron-Gafford G.A. (2017): Journal of Geophysical Research: Biogeosciences 122(1): 50-64

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Prevalence and magnitude of groundwater use by vegetation: a global stable isotope meta-analysis. Jaivime Evaristo and Jeffrey J. McDonnell (2017): Scientific Reports 7 Cross-CZO National

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Ecosystem Composition Controls the Fate of Rare Earth Elements during Incipient Soil Genesis. Zaharescu D.G., Burghelea C.I., Dontsova K., Presler J.K., Maier R.M., Huxman T., Domanik K.J., Hunt E.A., Amistadi M.K., Gaddis E.E., Palacios-Menendez M.A., Vaquera-Ibarra M.O. and Chorover J. (2017): Scientific Reports 7: 43208

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Expanding the role of reactive transport models in critical zone processes. Li Li, Kate Maher, Alexis Navarre-Sitchler, Jenny Druhan, Christof Meile, Corey Lawrence, Joel Moore, Julia Perdrial, Pamela Sullivan, Aaron Thompson, Lixin Jin, Edward W. Bolton, Susan L. Brantley, William E. Dietrich, K. Ulrich Mayer, Carl I. Steefel, Albert Valocchi, John Zachara, Benjamin Kocar, Jennifer Mcintosh, Benjamin M. Tutolo, Mukesh Kumar, Eric Sonnenthal, Chen Bao, Joe Beisman (2017): Earth-Science Reviews, 165:280-301 Cross-CZO

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Constraining frequency–magnitude–area relationships for rainfall and flood discharges using radar-derived precipitation estimates: example applications in the Upper and Lower Colorado River basins, USA. Orem C.A. and Pelletier J.D. (2016): Hydrology and Earth System Sciences 20: 4483-4501

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Colloids and Organic Matter Complexation Control Trace Metal Concentration-Discharge Relationships in Marshall Gulch Stream Waters. Trostle K.D., Runyon J.R., Pohlmann M.A., Redfield S.E., Pelletier J., McIntosh J., and Chorover J. (2016): Water Resources Research 52(10): 7931–7944

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The predominance of post-wildfire erosion in the long-term denudation of the Valles Caldera, New Mexico. Orem C.A. and Pelletier J.D. (2016): Journal of Geophysical Research: Earth Surface 121(5): 843–864

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The influence of Holocene vegetation changes on topography and erosion rates: a case study at Walnut Gulch Experimental Watershed, Arizona. Pelletier J. D., Nichols M. H., and Nearing M. A. (2016): Earth Surface Dynamics 4: 471-488

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Tree Morphologic Plasticity Explains Deviation from Metabolic Scaling Theory in Semi-Arid Conifer Forests, Southwestern USA. Swetnam T.L., O’Connor C.D., Lynch A.M. (2016): PLoS ONE 11(7): e0157582

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Influence of climate variability on water partitioning and effective energy and mass transfer in a semi-arid critical zone. Zapata-Rios X., Brooks P.D., Troch P.A., McIntosh J., and Rasmussen C. (2016): Hydrology and Earth System Sciences 20: 1103-1115

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Topographic correlations with soil and regolith thickness from shallow-seismic refraction constraints across upland hillslopes in the Valles Caldera, New Mexico. Olyphant J., Pelletier J.D., and Johnson R. (2016): Earth Surface Processes and Landforms 41(12): 1684–1696

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U-series isotopic signatures of soils and headwater streams in a semi-arid complex volcanic terrain. Huckle D., Ma L., McIntosh J., Vázquez-Ortega A., Rasmussen C., Chorover J. (2016): Chemical Geology 445: 68-83

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Multi-scale predictions of massive conifer mortality due to chronic temperature rise. McDowell N.G., Williams A.P., Xu C., Pockman W.T., Dickman L.T., Sevanto S., Pangle R., Limousin J., Plaut J., Mackay D.S., Ogee J., Domec J.C., Allen C.D., Fisher R.A., Jiang X.,Muss J.D., Breshears D.D., Rauscher S.A. and Koven C. (2016): Nature Climate Change 6 (3): 295-300

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Understanding ecosystem services from a geosciences perspective. Field J.P., Breshears D.D., Law D.J., Villegas J.C., López-Hoffman L., Brooks P.D., Chorover J., and Pelletier J.D. (2016): EOS 97

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Solid-phase redistribution of rare earth elements in hillslope pedons subjected to different hydrologic fluxes. Vázquez-Ortega A., Huckle D., Perdrial J., Amistadi M.K., Durcik M., Rasmussen C., McIntosh J., Chorover J. (2016): Chemical Geology 426: 1-18

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Influence of terrain aspect on water partitioning, vegetation structure, and vegetation greening in high elevation catchments in northern New Mexico. Zapata-Rios X., Brooks P.D., Troch P.A., McIntosh J. and Guo Q. (2016): Ecohydrology 9(5): 782-795 Cross-CZO National

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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

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Critical Zone Services: Expanding Context, Constraints, and Currency beyond Ecosystem Services. Field J.P., Breshears D.D., Law D.J., Villegas J.C., López-Hoffman L., Brooks P.D., Chorover J., Barron-Gafford G.A., Gallery R.E., Litvak M.E., Lybrand R.A., McIntosh J.C., Meixner T., Niu G-Y., Papuga S.A., Pelletier J.D., Rasmussen C.R., and Troch P.A (2015): Vadose Zone Journal 14(1)


Designing a network of critical zone observatories to explore the living skin of the terrestrial Earth. Brantley, S.L., McDowell, W.H., Dietrich, W.E., White, T.S., Kumar, P., Anderson, S., Chorover, J., Lohse, K.A., Bales, R.C., Richter, D., Grant, G., and Gaillardet, J. (2017): Earth Surface Dynamics Cross-CZO National

Study of the Spatiotemporal Characteristics of Meltwater Contribution to the Total Runoff in the Upper Changjiang River Basin. Fang Y.-H., Zhang X., Niu G.-Y., Zeng W., Zhu J., Zhang T. (2017): Water 9(3): 165

Reviews and syntheses: On the roles trees play in building and plumbing the Critical Zone. Brantley, Susan L., David M. Eissenstat, Jill A. Marshall, Sarah E. Godsey, Zsuzsanna Balogh-Brunstad, Diana L. Karwan, Shirley A. Papuga, Joshua Roering, Todd E. Dawson, Jaivime Evaristo, Oliver Chadwick, Jeffrey J. McDonnell, Kathleen C. Weathers (2017): Biogeosciences Discussions Cross-CZO National

Pore water chemistry reveals gradients in mineral transformation across a model basaltic hillslope. Pohlmann M., Dontsova K., Root R., Ruiz J., Troch P., and Chorover J. (2016): Geochemistry, Geophysics, Geosystems 17(6): 2054–2069

Recent tree die-off has little effect on streamflow in contrast to expected increases from historical studies. Biederman J.A., Somor A.J., Harpold A.A., Gutmann E.D., Breshears D.D., Troch P.A., Gochis D.J., Scott R.l., Meddens A.J.H., and Brooks P.D. (2015): Water Resources Research 51(12): 9775-9789 Cross-CZO

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