News

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CUAHSI Instrumentation Discovery Travel Grants

23 Aug 2018 - CUAHSI is accepting proposals for the Instrumentation Discovery Travel Grant program (IDTG). Application deadline is Septemeber 30, 2018.

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CZOs at AGU 2018

23 Aug 2018 - The 2018 AGU Fall Meeting will be held December 10-14 in Washington, D.C.

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Call for proposals: Research Coordination Networks (RCNs) Driving Convergent CZ Science

12 Jul 2018 - NSF Dear Colleague Letter: Research Coordination Networks (RCNs) for Driving Convergent Science in the Critical Zone

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NSF Discovery articles focus on the CZOs.

10 May 2018 - The Discoveries section of the National Science Foundation's website on Critical Zone Observatories (CZOs).

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Earth’s skin is an interdisciplinary laboratory

29 Jan 2018 - In the January 2018 issue of Physics Today, writer Toni Feder explores the scope of CZ research in the article, “Earth’s skin is an...

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White paper of 2017 CZ Science Meeting in Arlington, VA

01 Jan 2018 - New Opportunities for Critical Zone Science Following the June 2017 Arlington Meeting for Critical Zone Science (hosted by CZO), a white booklet...

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

01 Jan 2018 - 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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CZOs at AGU 2017

05 Dec 2017 - Information on CZO award recipients, events, presentations, etc. at the 2017 AGU Fall Meeting.

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Water Resources Research Special Collection: Concentration-discharge relations in the critical zone

30 Oct 2017 - Water Resources Research published a new special collection in September 2017 featuring concentration-discharge research from multiple CZOs.

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CZNews: Fall 2017

25 Oct 2017 - The CZO National Office's quarterly newsletter CZNews: Fall 2017.

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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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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...


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

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

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.

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Events

AGU Fall Meeting 2018

American Geophysical Union (AGU) Fall Meeting 2018


Washington, D.C..

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Publications

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A considerable fraction of soil-respired CO2 is not emitted directly to the atmosphere. Sánchez-Cañete E.P., Barron-Gafford G.A. & Chorover J. (2018): Scientific Reports 8: 13518

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Controlled Experiments of Hillslope Coevolution at the Biosphere 2 Landscape Evolution Observatory: Toward Prediction of Coupled Hydrological, Biogeochemical, and Ecological Change. Volkmann T.H.M., Sengupta A., Pangle L.A., Dontsova K., Barron-Gafford G.A., Harman C.J., Niu G.-Y., Meredith L.K., Abramson N., Meira Neto A.A., Wang Y., Adams J.R., Breshears D.D., Bugaj A., Chorover J., Cueva A., DeLong S.B., Durcik M., Ferre T.P.A., Hunt E.A., Huxman T.E., Kim M., Maier R.M., Monson R.K., Pelletier J.D., Pohlmann M., Rasmussen C., Ruiz J., Saleska S.R., Schaap M.G., Sibayan M., Tuller M., van Haren J.L.M., Zeng X. and Troch P.A. (2018): in: Hydrology of Artificial and Controlled Experiments (eds. Jiu-Fu Liu and Wei-Zu Gu), IntechOpen, pp. 25-74

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Why Do Large‐Scale Land Surface Models Produce a Low Ratio of Transpiration to Evapotranspiration?. Chang L.-L., Dwivedi R., Knowles J.F., Fang Y.-H., Niu G.-Y., Pelletier J.D., Rasmussen C., Durcik M., Barron‐Gafford G.A., Meixner T. (2018): Journal of Geophysical Research: Atmospheres (online)

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Controls on Soil Organic Carbon Partitioning and Stabilization in the California Sierra Nevada. Rasmussen C., Throckmorton H., Liles G., Heckman K., Meding S., and Horwath W.R. (2018): Soil Systems 2(3): 41 Cross-CZO

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Snowmelt‐driven trade‐offs between early and late season productivity negatively impact forest carbon uptake during drought. Knowles J.F., Molotch N.P., Trujillo E. & Litvak M.E. (2018): Geophysical Research Letters 45: 3087–3096 Cross-CZO

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Impact of Hydraulic Redistribution on Multispecies Vegetation Water Use in a Semiarid Savanna Ecosystem: An Experimental and Modeling Synthesis. Lee, E., Kumar, P., Barron-Gafford, G.A., Hendryx, S.M., Sanchez-Canete, E.P., Minor, R.L., Colella, T., and Scott, R.L. (2018): Water Resources Research Cross-CZO

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Trace element mobilization during incipient bioweathering of four rock types. Burghelea C.I., Dontsova K., Zaharescu D.G., Maier R.M., Huxman T., Amistadi M.K., Hunt E., Chorover J. (2018): Geochimica et Cosmochimica Acta 234: 98-114

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A net ecosystem carbon budget for snow dominated forested headwater catchments: linking water and carbon fluxes to critical zone carbon storage. Perdrial J., Brooks P.D., Swetnam T., Lohse K.A., Rasmussen C., Litvak M., Harpold A.A., Zapata-Rios X., Broxton P., Mitra B., Meixner M., Condon K., Huckle D., Stielstra C., Vázquez-Ortega A., Lybrand R., Holleran M., Orem C., Pelletier J., Chorover J. (2018): Biogeochemistry 138{3): 225–243 Cross-CZO

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Implementing dynamic root optimization in Noah‐MP for simulating phreatophytic root water uptake. Wang P., Niu G.‐Y., Fang Y.‐H., Wu R.‐J., Yu J.‐J., Yuan G.‐F., Pozdniakov S.P., and Scott R.L. (2018): Water Resources Research 54(3): 1560–1575

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Which way do you lean? Using slope aspect variations to understand Critical Zone processes and feedbacks. Pelletier J. D., Barron‐Gafford G. A., Gutiérrez‐Jurado H., Hinckley E.‐L. S., Istanbulluoglu E., McGuire L. A., Niu G.‐Y., Poulos M. J., Rasmussen C., Richardson P., Swetnam T. L., and Tucker G. E. (2018): Earth Surface Processes and Landforms, 43(5): 1133–1154 Cross-CZO

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Research frontiers for improving our understanding of drought‐induced tree and forest mortality. Hartmann, H., Moura, C.F., Anderegg, W.R., Ruehr, N.K., Salmon, Y., Allen, C.D., Arndt, S.K., Breshears, D.D., Davi, H., Galbraith, D., Ruthrof, K.X., Wunder, J., Adams, H.D., Bloemen, J., Cailleret, M., Cobb, R., Gessler, A., Grams, T.E., Jansen, S., Kautz, M., Lloret, F. and O'Brien, M. (2018): New Phytologist 218(1): 15-28

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Climate, topography, and dust influences on the mineral and geochemical evolution of granitic soils in southern Arizona. Lybrand R.A. and Rasmussen C. (2018): Geoderma 314: 245-261

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Humidity determines snowpack ablation under a warming climate. Harpold A.A. and Brooks P.D. (2018): PNAS 115(6): 1215-1220 Cross-CZO

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Beyond clay: towards an improved set of variables for predicting soil organic matter content. Rasmussen C., Heckman K., Wieder W.R., Keiluweit M., Lawrence C.R., Berhe A.A., Blankinship J.C., Crow S.E., Druhan J.L., Hicks Pries C.E., Marin-Spiotta E., Plante A.F., Schädel C., Schimel J.P., Sierra C.A., Thompson A., Wagai R. (2018): Biogeochemistry 137(3): 297–306 Cross-CZO

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Wet–dry cycles impact DOM retention in subsurface soils. Olshansky Y., Root R.A., and Chorover J. (2018): Biogeosciences 15: 821-832

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Ecosystem dynamics and management after forest die-off: a global synthesis with conceptual state-and-transition models. Cobb R.C., Ruthrof K.X., Breshears D.D., Lloret F., Aakala T., Adams H.D., Anderegg W.R.L., Ewers B.E., Galiano L., Grünzweig J.M., Hartmann H., Huang C., Klein T., Kunert N., Kitzberger T., Landhäusser S.M., Levick S., Preisler Y., Suarez M.L., Trotsiuk V., and Zeppel M.J.B (2017): Ecosphere 8(12)

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Neoichnology of Semiarid Environments: Soils and Burrowing Animals of the Sonoran Desert, Arizona, USA. Hembree, D.I., Smith, J.J., Buynevich, I.V., and Platt, B.F. (2017): PALAIOS 32(9):620-638

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Concentration-Discharge Relations in the Critical Zone: Implications for Resolving Critical Zone Structure, Function and Evolution. Chorover, J., Derry, L. A., McDowell, W. H. (2017): Water Resources Research 53(11): 8654–8659 Cross-CZO National

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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 42 (14): 2498-2502 Cross-CZO National

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The temperature response surface for mortality risk of tree species with future drought. Adams H.D., Barron-Gafford G.A., Minor R.L., Gardea A.A., Bentley L.P., Law D.J., Breshears D.D., McDowell N.G., Huxman T.E. (2017): Environmental Research Letters 12(11): 115014

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Photosynthetic phenological variation may promote coexistence among co-dominant tree species in a Madrean sky island mixed conifer forest. Potts D.L., Minor R.L., Braun Z., Barron-Gafford G.A. (2017): Tree Physiology 37(9): 1229–1238

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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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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, 5, 841–860 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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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, 14, 5115-5142 Cross-CZO National

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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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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)


Topographically driven differences in energy and water constrain climatic control on forest carbon sequestration . Swetnam, TL, Brooks, PD, Barnard, HR, Harpold, AA, and Gallo, EL (2017): Ecosphere 8 (4): e01797. Cross-CZO

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

Addendum: 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. & Koven C (2016): Nature Climate Change 6: 1048

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

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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