Publications

Publications Found: 1437

Short-term favorable weather conditions are an important control of interannual variability in carbon and water fluxes
Zscheischler, J., Fatichi, S., Wolf, S., Blanken, P., Bohrer, G., Clark, K., Desai, A., Hollinger, D., Keenan, T., Novick, K.A., Seneviratne, S.I.

Ecosystem models often perform poorly in reproducing interannual variability in carbon and water fluxes, resulting in considerable uncertainty when estimating the land-carbon sink. While many aggregated variables (growing season length, seasonal precipitation, or temperature) have been suggested as predictors for interannual variability …


Journal: Journal of Geophysical Research - Biogeosciences, Volume 121 (8): 2186-2198 (2016). DOI: 10.1002/2016JG003503 Sites: US-Bar, US-Ced, US-Ho1, US-MMS, US-NR1, US-PFa, US-Slt, US-UMB

Optimization Of A Biochemical Model With Eddy Covariance Measurements In Black Spruce Forests Of Alaska For Estimating Co 2 Fertilization Effects
Ueyama, M., Tahara, N., Iwata, H., Euskirchen, E. S., Ikawa, H., Kobayashi, H., Nagano, H., Nakai, T., Harazono, Y.


Journal: Agricultural And Forest Meteorology, Volume 222: 98-111 (2016). DOI: 10.1016/j.agrformet.2016.03.007 Sites: US-Bn1, US-Prr

Seasonality of temperate forest photosynthesis and daytime respiration
Wehr, R., Munger, J. W., McManus, J. B., Nelson, D. D., Zahniser, M. S., Davidson, E. A., Wofsy, S. C., Saleska, S. R.

Terrestrial ecosystems currently offset one-quarter of anthropogenic carbon dioxide (CO2) emissions because of a slight imbalance between global terrestrial photosynthesis and respiration. Understanding what controls these two biological fluxes is therefore crucial to predicting climate change. Yet there is no way of directly measuring …


Journal: Nature, Volume 534: 680-683 (2016). DOI: 10.1038/nature17966 Sites: US-Ha1

Ecohydrological Changes In Semiarid Ecosystems Transformed From Shrubland To Buffelgrass Savanna
Castellanos, A. E., Celaya‐Michel, H., Rodríguez, J. C., Wilcox, B. P.

In arid and semiarid lands worldwide, vegetation cover is being transformed to savannas dominated by exotic grasses. However, the ecohydrological and biogeochemical changes associated with this process remain little understood. For more than 3 years, we studied soil moisture dynamics in natural semiarid shrubland patches and compared …


Journal: Ecohydrology, Volume 9 (8): 1663-1674 (2016). DOI: doi:10.1002/eco.1756 Sites: MX-CHB, MX-CHN

Summertime greenhouse gas fluxes from an urban bog undergoing restoration through rewetting
Christen, A., Jassal, R.S., Black, T.A., Grant, N.J., Hawthorne, I, Johnson, M.S., Lee, S.-C., Merkens, M.

Rewetting can promote the ecological recovery of disturbed peatland ecosystems and may help to revert these ecosystems to carbon dioxide (CO2) sinks. However, rewetting of disturbed peatlands can also cause substantial emissions of methane (CH4) and possibly nitrous oxide (N2O). This study quantified summertime emissions of the three …


Journal: Mires And Peat, Volume (17): 1-24 (2016), ISBN 1819-754X. DOI: 10.19189/MaP.2015.OMB.207 Sites: CA-DBB

Long-Rotation Sugarcane In Hawaii Sustains High Carbon Accumulation And Radiation Use Efficiency In 2nd Year Of Growth
Anderson, R. G., Tirado-Corbalá, R., Wang, D., Ayars, J. E.

Sugarcane has been a major agronomic crop in Hawaii with an unique, high-yield, two-year production system. However, parameters relevant to advanced, cellulosic biofuel production, such as net ecosystem productivity (NEP) and radiation use efficiency (RUE), have not been evaluated in Hawaii under commercial production. Recent demand …


Journal: Agriculture, Ecosystems & Environment, Volume 199: 216-224 (2015). DOI: 10.1016/j.agee.2014.09.012 Sites: US-SuM, US-SuS, US-SuW

Does day and night sampling reduce spurious correlation between canopy photosynthesis and ecosystem respiration?
Dennis Baldocchi, Cove Sturtevant

It is necessary to partition eddy covariance measurements of carbon dioxide exchange into its offsetting gross fluxes, canopy photosynthesis, and ecosystem respiration, to understand the biophysical controls on the net fluxes. And independent estimates of canopy photosynthesis (G) and ecosystem respiration (R) are needed to validate …


Journal: Agricultural and Forest Meteorology, Volume 207: 117-126 (2015). DOI: 10.1016/j.agrformet.2015.03.010 Sites: CA-Ca1, CA-Ca2, CA-Ca3, CA-Let, CA-Mer, CA-NS1, CA-NS3, CA-NS5, CA-NS6, CA-NS7, CA-Oas, CA-Obs, CA-Ojp, CA-Qcu, CA-Qfo, CA-SJ2, CA-SJ3, CA-TP4, CA-WP1, US-ARM, US-Aud, US-Bo1, US-Ho1, US-Ho2, US-IB2, US-KS2, US-MMS, US-MOz, US-NC2, US-NR1, US-SO2, US-SO3, US-SO4, US-SP2, US-SP3, US-SRM, US-Ton, US-Tw3, US-UMB, US-Var, US-WBW, US-Wkg, US-Wrc

Landscape-level terrestrial methane flux observed from a very tall tower
Desai, A.R., Xu, K., Tian, H., Weishampel, P., Thom, J., Baumann, D., Andrews, A.E., Cook, B.D., King, J.Y., Kolka, R.

Simulating the magnitude and variability of terrestrial methane sources and sinks poses a challenge to ecosystem models because the biophysical and biogeochemical processes that lead to methane emissions from terrestrial and freshwater ecosystems are, by their nature, episodic and spatially disjunct. As a consequence, model predictions …


Journal: Agricultural and Forest Meteorology, Volume 201: 61-75 (2015). DOI: 10.1016/j.agrformet.2014.10.017 Sites: US-PFa

Extreme Drought Effects On Summer Evapotranspiration And Energy Balance Of A Grassland In The Southern Great Plains
Rajan, N., Maas, S. J., Cui, S.

We investigated the impact of the 2011 severe drought on summer evapotranspiration (ET) and energy partitioning of a managed Old World bluestem grassland in the Southern Great Plains and compared the results with those from 2010, a hydrologically wet year. Measurements of CO2, latent heat (LE), and sensible heat (H) fluxes …


Journal: Ecohydrology, Volume 8 (7): 1194-1204 (2015). DOI: 10.1002/eco.1574 Sites: US-LGr

Snowpack-Atmosphere Gas Exchanges Of Carbon Dioxide, Ozone, And Nitrogen Oxides At A Hardwood Forest Site In Northern Michigan
Seok, B., Helmig, D., Liptzin, D., Williams, M. W., Vogel, C. S.


Journal: Elementa: Science Of The Anthropocene, Volume 3: 000040 (2015). DOI: 10.12952/journal.elementa.000040 Sites: US-UMB