Adrian Harpold
INVESTIGATOR, PostDoc
Former Post Doc at Jemez-Catalina
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Boulder, Catalina-Jemez NSF EAR Postdoctoral Fellow at INSTAAR and NCAR
INSTAAR - Institute of Arctic & Alpine Research
Harpold's INSTAAR page
NSF EAR Postdoctoral Fellow at INSTAAR and NCAR
NCAR - National Center for Atmospheric Research
University of Nevada-Reno
Harpold's page
MS, Virginia Tech
PhD, Cornell University, 2010
Postdoctoral, Hydrology and Water Resources, University of Arizona
My research questions are three-fold and focused on understanding water availability and partitioning in seasonally snow-covered montane forested catchments: 1. How does vegetation structure modulate the efficiency of snowpacks for providing ecosystem services across a climate gradient of mixed-conifer forests? 2. How is water availability likely to respond to projected increases in forest disturbance and changes to the the amount and timing of snowmelt? 3. How do we scale ‘point’ measurements from intensively studied research watersheds to larger water resource management areas in the face of climate and landscape variability?
CZO Research Groups
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CZO Publications
Papers/Books
2018
Humidity determines snowpack ablation under a warming climate. Harpold A.A. and Brooks P.D. (2018): PNAS 115(6): 1215-1220 Cross-CZO
2018
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
2017
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
2017
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
2017
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
2017
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
2017
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
2016 (In Review)
Snowmelt Rate Dictates Streamflow . Barnhart, T.B., Molotch, N.P., Harpold, A., Knowles, J., Livneh, B., and Schneider, D., (2016): Geophysical Research Letters.
2016 (In Press)
Diverging Sensitivity of Soil Water Stress To Changing Snowmelt Timing in the Western US . Harpold, A.A. (2016): Advances in Water Resources. 10.1016/j.advwatres.2016.03.017 National
2015
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
2015
Quantifying the effects of vegetation structure on snow accumulation and ablation in mixed-conifer forests. Broxton P. D., Harpold A. A., Biederman J. A., Troch P. A., Molotch N. P., and Brooks P. D. (2015): Ecohydrology 8(6): 1073-1094 Cross-CZO
2015
Soil moisture response to snowmelt timing in mixed-conifer subalpine forests. Harpold A. A., Molotch N. P., Musselman K. N., Bales R. C., Kirchner P. B., Litvak M. and Brooks P. D. (2015): Hydrological Processes 29(12): 2782–2798 Cross-CZO
2015
Laser vision: lidar as a transformative tool to advance critical zone science. Harpold, A. A., Marshall, J. A., Lyon, S. W., Barnhart, T. B., Fisher, B. A., Donovan, M., Brubaker, K. M., Crosby, C. J., Glenn, N. F., Glennie, C. L., Kirchner, P. B., Lam, N., Mankoff, K. D., McCreight, J. L., Molotch, N. P., Musselman, K. N., Pelletier, J., Russo, T., Sangireddy, H., Sjöberg, Y., Swetnam, T., and West, N. (2015): Hydrol. Earth Syst. Sci., 19, 2881-2897 Cross-CZO National
2015 (In Review)
Variable Groundwater Contributions Influence Nutrient Cycling in Montane Headwater Catchments. Harpold, A., Brooks, P., Perdrial, J., Lohse, K., McIntosh, J., Meixner, T., Zapata-Rios, X., Vazquez-Ortega, A., and J. Chorover (2015): Water Resources Research
2015
Sensitivity of Soil Water Availability to Changing Snowmelt Timing in the Western US . Harpold, A.A., and Molotch N.P. (2015): Geophysical Research Letters. 42. National
2015 (In Press)
The relative contributions of alpine and subalpine ecosystems to the water balance of a mountainous, headwater catchment . Knowles, J.F., Harpold, A.A., Cowie, R., Zeliff, M., Barnard, H.R., Burns, S.P., Blanken, P.D., Morse, J.F., and Williams, M.W. (2015): Hydrological Processes, in press
2015
Climate and landscape as drivers of carbon storage in forested headwater catchments: Insights from a complete C budget. Perdrial, J., Brooks, P., Swetnam, T., Lohse, K., Rasmussen, C., Litvak, M., Harpold, A., Zapata-Rios, X., Broxton, P., Mitra, B., Meixner, T., Condon, K., Huckle, D., Stielstra, C., Vazquez-Ortega, A., Lybrand, R., Holleran, M., Orem, C., Pelletier, J., and J. Chorover (2015): Global Change Biology
2015
Rare Earth Elements as Reactive Tracers of Biogeochemical Weathering in Forested Rhyolitic Terrain. Vázquez-Ortega A., Perdrial J., Harpold A., Zapata-Ríos X., Rasmussen C., McIntosh J., Schaap M., Pelletier J.D., Brooks P.D., Amistadi M.K., Chorover J. (2015): Chemical Geology 391: 19-32 Cross-CZO
2014
Multi-scale Observations of Snow Accumulation and Peak Snowpack Following Widespread, Insect-induced Lodgepole Pine Mortality. Biederman J. A., Brooks P. D., Harpold A. A., Gutmann E., Gochis D. J., Reed D. E., and Pendall E. (2014): Ecohydrology 7(1): 150–162 Cross-CZO
2014
Increased evaporation following widespread tree mortality limits streamflow response. Biederman J.A., Harpold A.A., Gochis D.J., Ewers B.E., Reed D.E., Papuga S.A., and Brooks P.D. (2014): Water Resources Research 50(7): 5395–5409 Cross-CZO
2014
Changes in snow accumulation and ablation following the Las Conchas Forest Fire, New Mexico, USA. Harpold A.A., Biederman J.A., Condon K., Merino M., Korgaonkar Y., Nan T., Sloat L.L., Ross M. and Brooks P.D. (2014): Ecohydrology 7(2): 440–452 Cross-CZO
2014
LiDAR-derived snowpack data sets from mixed conifer forests across the Western United States. Harpold, A.A., Q. Guo, N. Molotch, P. D. Brooks, R. Bales, J.C. Fernandez-Diaz, K.N. Musselman, and T.L. Swetnam, P. Kirchner, M. Meadows, J. Flanagan, R. Lucas (2014): Water Resources Research 50(3): 2749-2755 Cross-CZO
2014
Stream water carbon controls in seasonally snow-covered mountain catchments: impact of inter-annual variability of water fluxes, catchment aspect and seasonal processes. Perdrial J.N., McIntosh J., Harpold A., Brooks P.D., Zapata-Rios X., Ray J., Meixner T., Kanduc T., Litvak M., Troch P.A., Chorover J. (2014): Biogeochemistry 118(1-3): 273-290 Cross-CZO
2012
Changes in snowpack accumulation and ablation in the intermountain west. Harpold A.A., Brooks P.D., Rajogopal S., Heidebuchel I., Jardine A., and Stielstra C. (2012): Water Resources Research 48: W11501
2012
Impacts of Sampling Dissolved Organic Matter with Passive Capillary Wicks Versus Aqueous Soil Extraction. Perdrial J.N., Perdrial N., Harpold A., Gao X., Gabor R., LaSharr K., and Chorover J. (2012): Soil Science Society of America Journal, 76: 2019–2030 Cross-CZO
2011
How Water, Carbon, and Energy Drive Critical Zone Evolution: The Jemez-Santa Catalina Critical Zone Observatory . Chorover J., Troch P.A., Rasmussen C., Brooks P., Pelletier J., Breshears D.D., Huxman T., Lohse K., McIntosh J., Meixner T., Papuga S., Schaap M., Litvak M., Perdrial J. Harpold A., and Durcik M. (2011): Vadose Zone Journal 10(3): 884-899
Papers and books that explicitly acknowledge a CZO grant are highlighted in PALE ORANGE.
Other CZO Publications
2018
Multi-disciplinary Insights in to the Effects of Vegetation Change on Hydrologic Partitioning (Invited). Brooks, P.D., Barnard, H.R., Biederman, J.A., Harpold, A., Singha, K., Swetnam, T.L., Tai, X. (2018): Abstract H21A-06 presented at 2018 AGU Fall Meeting, Washington, D.C., 10-14 Dec Cross-CZO
2018
Hydrologic Control of Catchment-Scale Dissolved Organic Carbon (DOC) Dynamics. Hang Wen*, Li Li, Julia N Perdrial, Benjamin Abbott, Thomas Adler, Susana Bernal, Remi Dupas, Sarah Godsey, Rebecca L Hale, Adrian Harpold, Donna M Rizzo, Gary Sterle, Kristen Underwood (2018): Abstract H13J-1880 presented at 2018 AGU Fall Meeting, Washington, D.C., 10-14 Dec Cross-CZO
2018
Combining long-term observations with experiments to test hypotheses on stream water dissolved organic carbon dynamics at the Sleepers River Research Watershed. Julia N Perdrial*, Malayika M Cincotta, Jesse Armfield, Thomas Adler, James B Shanley, Kristen Underwood, Donna M Rizzo, Hang Wen, Li Li, Adrian Harpold, Gary Sterle (2018): Abstract H12D-07 presented at 2018 AGU Fall Meeting, Washington, D.C., 10-14
2016
Interactions Between Hydroclimate and Soil Properties Control the Risk for Altered Hydrologic Partitioning from Changing Snowmelt in the Sierra Nevada. Harpold, A. (2016): Yosemite Hydroclimate Meeting
2016
Diverging Sensitivity of Soil Water Stress To Changing Snowmelt Timing in the Western US . Harpold, A.A. (2016): Advances in Water Resources. 10.1016/j.advwatres.2016.03.017 National
2016
Is Snow a Drought Buster? The Need to Incorporate Snow into Common Drought Indices. Weiner, J.; Harpold, A.A.; Safeeq, M. (2016): Fall Meeting, American Geophysical Union, December 2016. Abstract H21G-1508.
2015
Rapid Snowmelt Leads to Greater Streamflow Across the Western United States. Barnhart, T. B., B. Livneh, N.P. Molotch, J. F. Knowles, A. A. Harpold and D. Schneider (2015): C41F-02 Modeling Snow and Streamflow for Water Supply Forecasts from Mountain Basins in a Rapidly Changing Climate II, presented at 2015 Fall Meeting, AGU, San Francisco, CA, 14-18 Dec.
2015
Sensitivity of Hydrologic Partitioning to Snowpack Dynamics. Barnhart, T.B., Molotch, N.P., Harpold, A., Knowles, J., Livneh, B., and Schneider, D. (2015): University of Colorado Hydrologic Sciences Symposium: Water in Motion: The role of an irreplaceable resource, University of Colorado, Boulder, April 2-3. Cross-CZO
2015
Sensitivity of hydrologic partitioning to snowpack dynamics. Barnhart, T.B., Molotch, N.P., Harpold, A., Livneh, B., Knowles, J., and Anderson, S. (2015): Water Sustainability and Climate Principal Investigator Meeting at the National Science Foundation, Arlington, VA, February 9-11. Cross-CZO
2015
Sensitivity of Hydrologic Partitioning to Snowpack Dynamics . Barnhart, T.B., Molotch, N.P., Livneh, B., Harpold, A.A., Knowles, J.F., Anderson, S.P., Bales, R.C., and Hunsaker, C.T. (2015): Poster, presented at the Western Snow Conference, Grass Valley, CA, April 20-23. Cross-CZO
2015
Sensitivity of Soil Water Availability to Changing Snowmelt Timing in the Western US . Harpold, A.A., and Molotch N.P. (2015): Geophysical Research Letters. 42. National
2015
The relative contributions of alpine and subalpine ecosystems to the water balance of a mountainous, headwater catchment . Knowles, J.F., Harpold, A.A., Cowie, R., Zeliff, M., Barnard, H.R., Burns, S.P., Blanken, P.D., Morse, J.F., and Williams, M.W. (2015): Hydrological Processes, in press
2015
Topographic Control of Aboveground Carbon Pools Across an Environmental Gradient, Eastern Slope of the Rocky Mountains, Colorado. Swetnam T., Brooks P., Gallo E., Barnard H., Harpold A. (2015): Abstract H21C-1382 presented at 2015 Fall Meeting, AGU, San Francisco, CA, 14-18 Dec. Cross-CZO
2015
LiDAR illuminates the influence of elevation, aspect, and vegetation on seasonal snowpack: case studies from four western Critical Zone Observatories. Tennant, C., Harpold, A., Crosby, B., Godsey, S., and K. Lohse (2015): American Geophysical Union, San Francisco, CA
2014
Sensitivity of hydrologic partitioning to snowpack dynamics, Como Creek, CO. Barnhart, T.B., Molotch N.P., Harpold A.A., Knowles J.F., and Anderson S.P. (2014): Abstract T4I, poster, CZO All Hands Meeting, Fish Camp, Calif., 22-24 Sept.
2014
Sensitivity of hydrologic partitioning to snowpack dynamics, Como Creek, CO, . Barnhart, T.B., Molotch N.P., Harpold A.A., Knowles J.F., and Anderson S.P. (2014): Abstract H51D-0643, poster, AGU Fall Meeting, San Francisco, Calif., 15-19 Dec.
2013
Compensatory vapor loss and biogeochemical attenuation along flowpaths mute the water resources impacts of insect-induced forest mortality. Biederman J.A., Brooks P.D., Harpold A.A., Gochis J.D., Ewers B.E., Reed D.E., Gutmann E.D. (2013): Abstract H14C-08 presented at 2013 Fall Meeting, AGU, San Francisco, CA, 9-13 Dec. Cross-CZO
2013
Non-linear Feedbacks Between Forest Mortality and Climate Change: Implications for Snow Cover, Water Resources, and Ecosystem Recovery in Western North America (Invited). Brooks P.D., Harpold A.A., Biederman J.A., Gochis D.J., Litvak M.E., Ewers B.E., Broxton P.D., Reed D.E. (2013): Abstract C51D-06 presented at 2013 Fall Meeting, AGU, San Francisco, CA, 9-13 Dec. Cross-CZO
2013
Bridging from Soil to Ecosystem Goods and Services Provided by the Critical Zone. Field J.P., Breshears D.D., Law D.J., Brooks P.D., Chorover J., Pelletier J.D., Troch P.A., López-Hoffman L., Rasmussen C., Papuga S., Harpold A., Biederman J.A., Barron-Gafford G.A., McIntosh J.C., Litvak M. (2013): Abstract presented at AGU Chapman Conference on Soil-mediated Drivers of Coupled Biogeochemical and Hydrological Processes Across Scales, Biosphere 2, Tucson, Arizona, 21-24 October 2013 (Poster) Cross-CZO
2013
AGI LiDAR Handout. Harpold, A.A. and T.S. White (2013): AGI 2013 handout National
2013
Graduate Research Group White Paper: Cross-CZO Research Potential. Harpold, A.A., D. Karwan, J. Perdrial, J.A. Marshall, J. Driscoll, A. Neal, and C. Phillips (2013): Internal CZO publication Cross-CZO National
2013
Do fire disturbances account for missing C in snow dominated headwater catchments in NM?. Perdrial J.N., Brooks P.D., Swetnam T., Lohse K.A., Rasmussen C., Harpold A.A., Litvak M.E., Broxton P.D., Mitra B., Condon K., Huckle D.M., Vazquez A., Lybrand R.A., Holleran M., Orem C.A., Meixner T., Chorover J. (2013): Abstract B33E-0531 presented at 2013 Fall Meeting, AGU, San Francisco, CA, 9-13 Dec. Cross-CZO
2012
The shifting nature of vegetation controls on peak snowpack with varying slope and aspect. Biederman J.A., Harpold A.A., Brooks P.D., Broxton P.D., Litvak M.E. (2012): Abstract C33D-0685 presented at 2012 Fall Meeting, AGU, San Francisco, Calif., 3-7 Dec (Poster). Cross-CZO
2012
Insects, Fires, and Climate Change: Implications for Snow Cover, Water Resources and Ecosystem Recovery in Western North America . Brooks P.D., Harpold A.A., Biederman J.A., Litvak M.E., Broxton P.D., Gochis D., Molotch N.P., Troch P.A., Ewers B.E. (2012): Abstract B21I-02 presented at 2012 Fall Meeting, AGU, San Francisco, Calif., 3-7 Dec (Talk). Cross-CZO
2012
Quantifying Variation in Solute Sources and Nutrient Cycling in Montane Headwater Catchments. Harpold A. A., Brooks P. D., Perdrial J. N., McIntosh J. C., Meixner T., Zapata X., Chorover J. (2012): Abstract B22D-06 presented at 2012 Fall Meeting, AGU, San Francisco, Calif., 3-7 Dec (Talk) Cross-CZO
2012
Carbon and water, the energy for weathering and chemical denudation. Perdrial J. N., Rasmussen C., McIntosh J. C., Zapata X., Harpold A. A., Vazquez A., Porter C. M., Brooks P. D., Meixner T., Mitra B., Troch P. A.,, Chorover J. (2012): Abstract EP41I-05 presented at 2012 Fall Meeting, AGU, San Francisco, Calif., 3-7 Dec (Talk) Cross-CZO
2012
Rare earth elements as reactive tracers of biogeochemical weathering in the Jemez River Basin Critical Zone Observatory. Vazquez A., Perdrial J. N., Harpold A. A., Zapata X., Rasmussen C., McIntosh J. C., Schaap M. G., Pelletier J. D., Amistadi M., Chorover J. (2012): Abstract H53I-1651 presented at 2012 Fall Meeting, AGU, San Francisco, Calif., 3-7 Dec (Poster). Cross-CZO
2011
Estimating Catchment-Scale Snowpack Variability in Complex Forested Terrain, Valles Caldera National Preserve, NM. A.A. Harpold, P.D. Brooks, J.A. Biederman, T. Swetnam (2011): AGU Fall Meeting Presentations Abstract C23F-05.
2011
Non-linear feedbacks between climate change, hydrologic partitioning, plant available water, and carbon cycling in montane forests . P.D. Brooks, M.E. Litvak, A.A. Harpold, N.P. Molotch, J.C. McIntosh, P.A. Troch, X. Zapata (2011): AGU Fall Meeting Presentations (Invited) Abstract GC34A-08. Cross-CZO
2011
Distinguishing grass from ground using LiDAR: Techniques and applications. Pelletier, J.D., Swetnam, T., Papuga, S.A., Nelson, K., Brooks, P.D., Harpold, A.A., Chorover , J. (2011): AGU Fall Meeting Presentations Abstract EP51E-05.
2011
Probing dissolved organic matter in the critical zone: a comparison between in situ sampling and aqueous soil extracts. Perdrial, J.N., Perdrial, N., Harpold, A.A., Peterson, A.M., Vasquez, A., Chorover, J. (2011): AGU Fall Meeting Presentations (Poster) Abstract B51A-0385.
2010
Quantifying the effects of mountain pine beetle infestation on water and biogeochemical cycles at multiple spatial and temporal scales . Brooks, P.D., Harpold, A.A., Somor, A.J., Troch, P.A., Gochis, D.J., Ewers, B.E., Pendall, E., Biederman, J.A., Reed, D., Barnard, H.R., Whitehouse, F., Aston, T., Borkhuu, B. (2010): AGU Fall Meeting Abstract U33B-04 (was B31E-0348).
2010
Trends in Snowpack Depths and the Timing of Snowmelt in the River Basins of the Intermountain West . Harpold, A.A., Rajagopal, S., Heidbuechel, I., Stielstra, C., Jardine, A.B., Brooks, P.D. (2010): AGU Fall Meeting Abstract H31I-08.
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News
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.
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: 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...
Sino-USA CZO scientists meet to discuss future collaborations
09 Oct 2015 - About 60 Chinese and American critical zone scientists met in Guiyang, China for two days of discussions and presentations on the significance of...
Understanding Vegetation-Snow Interactions and Critical Zone Sensitivity to Climate Change
01 Apr 2015 - Chris Tennant, Idaho State University, was awarded a NSF SAVI (Science Across Virtual Institutes) grant for cross-CZO research.
Hands-on learning exercises available from CZOs
10 Jun 2014 - CZO and AGI create succinct exercises for secondary education classrooms. The exercises are based on CZO data and were distributed to 16,000 teachers
Community Workshop: The Next Generation of LiDAR Analysis for Critical Zone Research
27 Feb 2014 - A three-day workshop on LiDAR processing techniques will be held in Boulder, CO May 12th-14th, 2014 Early-career CZ researchers should apply to attend
BcCZO at the American Geophysical Union’s 46th annual Fall Meeting!
01 Dec 2013 - Join the BcCZO and more than 22,000 Earth and space scientists, educators, students, and other leaders in San Francisco, California, 9-13 December,...
Boulder Creek CZO responds to record-breaking Colorado rainfall and flooding
13 Sep 2013 - Investigators and staff rush into action to collect samples and observe impacts
CZO Researchers Develop Hands-On Exercises for K-12 Teachers
28 May 2013 - Exploring the Critical Zone with LiDAR: A Hands-On Exercise
Post-doctoral researcher Adrian Harpold funded to accomplish cross-CZO science
11 Jan 2013 - Harpold awarded an NSF Earth Sciences Postdoctoral Fellowship for a research and education program that spans 3 western Critical Zone Observatories
Regional shifts in snowfall, melt in intermountain west
10 Jan 2013 - Congratulations to Jemez-Catalina scientists Adrian Harpold, Paul Brooks and others whose Water Resources Research paper pertaining to snowpack...
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