Drivers of chaparral photosynthetic rate reduction under modern drought conditions

Autor: Kyle Lunneberg, Kristine Bernabe, Donatella Zona, Walter C Oechel

Publikováno v: Environmental Research: Ecology, Vol 2, Iss 3, p 035006 (2023)

Terrestrial vegetation communities are experiencing rapid and novel changes to photosynthetic rates under the changing climate. Chaparral, a semi-arid shrubland ecosystem of the Southwestern United States and Northern Mexico, is projected to experien

Externí odkaz: https://doaj.org/article/039a067e4cf7468093764af19e83be18

Arctic greening associated with lengthening growing seasons in Northern Alaska

Autor: Kyle A Arndt, Maria J Santos, Susan Ustin, Scott J Davidson, Doug Stow, Walter C Oechel, Thao T P Tran, Brian Graybill, Donatella Zona

Publikováno v: Environmental Research Letters, Vol 14, Iss 12, p 125018 (2019)

Many studies have reported that the Arctic is greening; however, we lack an understanding of the detailed patterns and processes that are leading to this observed greening. The normalized difference vegetation index (NDVI) is used to quantify greenin

Externí odkaz: https://doaj.org/article/bd22187809d947b484f5236cdc20cedf

Intensified Positive Arctic–Methane Feedback under IPCC Climate Scenarios in the 21st Century

Autor: Yihui Wang, Liyuan He, Jianzhao Liu, Kyle A. Arndt, Jorge L. Mazza Rodrigues, Donatella Zona, David A. Lipson, Walter C. Oechel, Daniel M. Ricciuto, Stan D. Wullschleger, Xiaofeng Xu

Publikováno v: Ecosystem Health and Sustainability, Vol 10 (2024)

The positive Arctic–methane (CH4) feedback forms when more CH4 is released from the Arctic tundra to warm the climate, further stimulating the Arctic to emit CH4. This study utilized the CLM-Microbe model to project CH4 emissions across five distin

Externí odkaz: https://doaj.org/article/e737be960b664eb281f874354536f4da

Substantial hysteresis in emergent temperature sensitivity of global wetland CH4 emissions

Autor: Kuang-Yu Chang, William J. Riley, Sara H. Knox, Robert B. Jackson, Gavin McNicol, Benjamin Poulter, Mika Aurela, Dennis Baldocchi, Sheel Bansal, Gil Bohrer, David I. Campbell, Alessandro Cescatti, Housen Chu, Kyle B. Delwiche, Ankur R. Desai, Eugenie Euskirchen, Thomas Friborg, Mathias Goeckede, Manuel Helbig, Kyle S. Hemes, Takashi Hirano, Hiroki Iwata, Minseok Kang, Trevor Keenan, Ken W. Krauss, Annalea Lohila, Ivan Mammarella, Bhaskar Mitra, Akira Miyata, Mats B. Nilsson, Asko Noormets, Walter C. Oechel, Dario Papale, Matthias Peichl, Michele L. Reba, Janne Rinne, Benjamin R. K. Runkle, Youngryel Ryu, Torsten Sachs, Karina V. R. Schäfer, Hans Peter Schmid, Narasinha Shurpali, Oliver Sonnentag, Angela C. I. Tang, Margaret S. Torn, Carlo Trotta, Eeva-Stiina Tuittila, Masahito Ueyama, Rodrigo Vargas, Timo Vesala, Lisamarie Windham-Myers, Zhen Zhang, Donatella Zona

Publikováno v: Nature Communications, Vol 12, Iss 1, Pp 1-10 (2021)

Wetland methane emissions contribute to global warming, and are oversimplified in climate models. Here the authors use eddy covariance measurements from 48 global sites to demonstrate seasonal hysteresis in methane-temperature relationships and sugge

Externí odkaz: https://doaj.org/article/f3ee54eb6b4f4272ac1dc4d9c6d52c30

Pan‐Arctic soil moisture control on tundra carbon sequestration and plant productivity

Autor: Donatella Zona, Peter M. Lafleur, Koen Hufkens, Beniamino Gioli, Barbara Bailey, George Burba, Eugénie S. Euskirchen, Jennifer D. Watts, Kyle A. Arndt, Mary Farina, John S. Kimball, Martin Heimann, Mathias Göckede, Martijn Pallandt, Torben R. Christensen, Mikhail Mastepanov, Efrén López‐Blanco, Albertus J. Dolman, Roisin Commane, Charles E. Miller, Josh Hashemi, Lars Kutzbach, David Holl, Julia Boike, Christian Wille, Torsten Sachs, Aram Kalhori, Elyn R. Humphreys, Oliver Sonnentag, Gesa Meyer, Gabriel H. Gosselin, Philip Marsh, Walter C. Oechel

Publikováno v: Global Change Biology
Zona, D, Lafleur, P M, Hufkens, K, Gioli, B, Bailey, B, Burba, G, Euskirchen, E S, Watts, J D, Arndt, K A, Farina, M, Kimball, J S, Heimann, M, Göckede, M, Pallandt, M, Christensen, T R, Mastepanov, M, López-Blanco, E, Dolman, A J, Commane, R, Miller, C E, Hashemi, J, Kutzbach, L, Holl, D, Boike, J, Wille, C, Sachs, T, Kalhori, A, Humphreys, E R, Sonnentag, O, Meyer, G, Gosselin, G H, Marsh, P & Oechel, W C 2023, ' Pan-Arctic soil moisture control on tundra carbon sequestration and plant productivity ', Global change biology, vol. 29, no. 5, pp. 1267-1281 . https://doi.org/10.1111/gcb.16487

Long-term atmospheric CO2 concentration records have suggested a reduction in the positive effect of warming on high-latitude carbon uptake since the 1990s. A variety of mechanisms have been proposed to explain the reduced net carbon sink of northern

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4705f5341c253177292fbe1c2679ac46
https://doi.org/10.1111/gcb.16487