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About our group Our research is motivated by the compelling need to understand how climate change impacts ecosystems and society and how to mitigate and adapt to climate change. We strive to address these questions and advance sustainability by combining in-situ measurements, remote sensing, machine learning/AI, and Earth system modeling. Contact: Dr. Jingfeng Xiao, Research Professor E-mail: j.xiao at unh dot edu |
Update in January, 2024: Our Machine learning and FLUXNET based Carbon and Water Fluxes (MF-CW) product is available online. MF-CW is a 0.5-degree gross primary production (GPP), evapotranspiration (ET), and water use efficiency (WUE) product for the globe (1982-2016) and is upscaled from FLUXNET observations. The data can be downloaded from our Global Ecology Data Repository. Update in August, 2022: We gap-filled, partitioned flux data for nearly 300 AmeriFlux and NEON sites. The gaps of the meteorological data were filled with ERA5-Land reanalysis data, and the flux measurements were gap-filled and partitioned using standardized procedures. The data cover the period from the early 1990s to 2021. The data can be downloaded from our Global Ecology Data Repository. Highlights on recent papers: Lu, W.*, Xiao, J., Gao, H., Jia, Q., Li, Z., Liang, J., Xing, Q., Mao, D., Li, H., Chu, X., Chen, H., Guo, H., Han, G., Zhao, B., Chen, L., Lai, D.Y.F., Liu, S., Lin G. (2024) Carbon fluxes of China’s coastal wetlands and impacts of reclamation and restoration. Global Change Biology, 30, e17280. https://doi.org/10.1111/gcb.17280. [PDF] Li, F., Xiao, J., Chen, J., Ballantyne, A., Jin, K., Li, B., Abraha, M., John, R. (2023) Global water use efficiency saturation due to increased vapor pressure deficit. Science, 381, 672-677. DOI: 10.1126/science.adf5041. [Free full text in PDF] (Highlighted by Science on the very top of its homepage) Crockett, E.T.H.*, Atkins, J.W., Guo, Q., Sun, G., Potter, K.M., Ollinger,S., Silva, C.A., Tang, H., Woodall, C.W., Holgerson, J., Xiao, J. (2023) Structural and species diversity explain aboveground carbon storage in forests across the United States: evidence from GEDI and forest inventory data. Remote Sensing of Environment, 295, 113703. https://doi.org/10.1016/j.rse.2023.113703. [PDF] Wang, Y., Xiao, J., Ma, Y., Ding, J., Chen, X., Ding, Z., Luo, Y. (2023) Persistent and enhanced carbon sequestration capacity of alpine grasslands on the Earth’s Third Pole. Science Advances, 9, eade6875. DOI: 10.1126/sciadv.ade6875. [PDF] Li, X.*, Xiao, J. (2022) TROPOMI observations allow for robust exploration of the relationship between solar-induced chlorophyll fluorescence and terrestrial gross primary production. Remote Sensing of Environment, 268, 112748. https://doi.org/10.1016/j.rse.2021.112748. [PDF] Chang, Y.*, Xiao, J., Li, X., Middel, A., Zhang, Y., Gu, Z., Wu, Y., He, S. (2021) Exploring diurnal thermal variations in urban local climate zones with ECOSTRESS land surface temperature data. Remote Sensing of Environment, 263, 112544. https://doi.org/10.1016/j.rse.2021.112544. [PDF] (Highlighted by LP DAAC, USGS) Li, X.*, Xiao, J., Fisher, J.B., Baldocchi, D.D. (2021) ECOSTRESS estimates gross primary production with fine spatial resolution for different times of day from the International Space Station. Remote Sensing of Environment, 258, 112360. https://doi.org/10.1016/j.rse.2021.112360. [PDF] Wang, X.*, Xiao, J., Li, X., Cheng, G., Ma, M., Zhu, G., Arain, M.A., Black, T.A., Jassal, R.S. (2019) No trends in spring and autumn phenology during the global warming hiatus. Nature Communications, 10:2389, https://doi.org/10.1038/s41467-019-10235-8. [PDF] Group news: 2024: April: Weizhi, a former visiting scholar, published a nice synthesis study on carbon fluxes of China’s coastal wetlands and impacts of reclamation and restoration in Global Change Biology. [PDF] Jingfeng gave an invited talk on monitoring vegetation phenology using solar-induced chlorophyll fluorescence at the International Assocation of Landscape Ecology-North America (IALE-NA) annual meeting in Oklahoma City. March: Jingyi published a paper on dryland evapotranspiration estimation with remote sensing solar-induced chlorophyll fluorescence in Remote Sensing of Environment [PDF]. This is mainly based on her PhD work. 2023: December: Jingyi presented her work on the generation of global gridded, hourly estimates of evapotranspiration (ET) based on ECOSTRESS data and machine learning at AGU. Jingfeng talked about forest structural diversity and global water use efficiency at the conference. September: NCAR Climate Data Guide publishes an Expert Developer Guide on our GOSIF product, a global dataset of dataset of solar-induced chlorophyll fluorescence. August: In our Science paper published on August 11, 2023, we find that assumed increases in global ecosystem water use efficiency have stalled since 2001 due to rising vapor pressure deficit, which offsets CO2 fertilization and depresses photosynthesis but enhances evapotranspiration. [Free full text in PDF] (Highlighted by Science on the very top of its homepage) Xing Li, a former group member, published a nice paper in Science Advances: New-generation geostationary satellite reveals widespread midday depression in dryland photosynthesis during the 2020 western U.S. heatwave. [PDF] Yue Chang, a former group member, published a nice paper in Sustainable Cities and Society: Monitoring diurnal dynamics of surface urban heat island for urban agglomerations using ECOSTRESS land surface temperature observations. [PDF] July: Erin's paper came out in Remote Sensing of Environment: Structural and species diversity explain aboveground carbon storage in forests across the United States: evidence from GEDI and forest inventory data. [PDF] May: A Changing Estuary Lined With Red (by NASA Earth Observatory) covers papers on red beaches including our paper in Ecosphere in 2018 (Human activities accelerated the degradation of saline seepweed red beaches by amplifying top-down and bottom-up forces). A new vegetation phenology dataset in northern terrestrial ecosystems is published in Scientific Data by Dr. Jing Fang et al. Based on our GOSIF GPP data, this phenology dataset consists of start, end, and length of growing season (SOS, EOS, LOS) (0.05-deg; 2001-2020). [PDF] Our new paper just came out in Science Advances: Persistent and enhanced carbon sequestration capacity of alpine grasslands on the Earth’s Third Pole. Our research found that carbon sequestration capacity of alpine grasslands on the Tibetan Plateau has undergone persistent enhancement under a warmer and wetter climate. [PDF]
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Prospective graduate students and postdocs (and visiting students or scholars): |
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Perspectives/review articles highlighted: Xiao, J., Fisher, J.B., Hashimoto, H., Ichii, K., Parazoo, N.C. (2021) Emerging satellite observations for diurnal cycling of ecosystem processes. Nature Plants, 7, 877-887. https://doi.org/10.1038/s41477-021-00952-8. [PDF] [view-only version] Zhou, D., Xiao, J., Bonafoni, S., Berger, C., Deilami, K., Zhou, Y., Frolking, S., Yao, R., Qiao, Z., Sobrino, J.A. (2019) Satellite remote sensing of surface urban heat islands: Progress, challenges, and perspectives. Remote Sensing, 2019, 11, 48; doi:10.3390/rs11010048. [PDF]
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Special issues: Vegetation monitoring with geostationary satellite observations, Remote Sensing of Environment, Guest Editors: Benjamin Dechant, Paul Stoy, Kazuhito Ichii, Jingfeng Xiao, Weile Wang
Carbon flux, water use and surface energy balance of forest plantations, Agricultural and Forest Meteorology, Guest Editors: Xiaojuan Tong, Jingfeng Xiao, M. Altaf Arain
Impacts of Extreme Climate Events and Disturbances on Carbon Dynamics, Biogeosciences, Guest Editors: J. Xiao, S. Liu, P. Stoy
Advances in Upscaling of Eddy Covariance Measurements of Carbon and Water Fluxes, Journal of Geophysical Research - Biogeosciences, Guest Editors: J. Xiao, K.J. Davis, M. Reichestein, J.Chen
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