Global Ecology Group
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About our group

Our research is motivated by the compelling need to understand the impacts of climate change and human activities on the Earth’s biosphere and the feedbacks to the climate. We strive to answer major science questions on global carbon/water cycles, climate-vegetation interactions, ecosystem dynamics, and coupled natural and human systems. We combine terrestrial biosphere modeling, remote sensing, field measurements, upscaling, model-data fusion, and statistical analysis to answer these science questions.


Dr. Jingfeng Xiao, Research Professor

E-mail: j dot xiao at unh dot edu

A postdoc position is now open:

The postdoc will study forest biodiversity (GEDI structural and in-situ species diversity) & its relation to forest productivity, C cycling, and disturbances and work with Forest Service scientists (e.g., Q. Guo, J. Atkins, G. Sun) and me. Salary is highly competitve. Contact me (j dot xiao at unh dot edu) if interested.

Update on March 15, 2021:

Our global, 0.05-deg SIF and GPP products (GOSIF & GOSIF GPP) have been extended to 2020. Both products are now available for 2000-2020.

Highlights on recent papers: (* indicates advisees)

Xiao, J., Fisher, J.B., Hashimoto, H., Ichii, K., Parazoo, N.C. (2021) Emerging satellite observations for diurnal cycling of ecosystem processes. Nature Plants. [PDF] [view-only version]

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. [PDF]

Chang, Y.*, Xiao, J., Li, X., Frolking, S., Zhou, D., Schneider, A., Weng, Q., Yu, P., Wang, X., Li, X., Liu, S., Wu, Y. (2021) Exploring diurnal cycles of surface urban heat island intensity in Boston with land surface temperature data derived from GOES-R geostationary satellites. Science of the Total Environment, 763, 144224. [PDF]

Li, X.*, Xiao, J., Kimball, J.S., Reichle, R.H., Scott, R.L., Litvak, M.E., Bohrer, G., Frankenberg, C. (2020) Synergistic use of SMAP and OCO-2 data in assessing the responses of ecosystem productivity to the 2018 U.S. drought. Remote Sensing of Environment, 251, 112062. [PDF]

Xu, H.*, Xiao, J., Zhang, Z., Ollinger, S.V., Hollinger, D.Y., Pan, Y., Wan, J. (2020) Canopy photosynthetic capacity drives contrasting age dynamics of resource use efficiencies between mature temperate evergreen and deciduous forests. Global Change Biology, 26, 6156-6167. [PDF]

Deng, J.*, Xiao, J., Ouimette, A., Zhang, Y., Sanders-DeMott, R., Frolking, S., Li, C. (2020) Improving a biogeochemical model to simulate surface energy, greenhouse gas fluxes, and radiative forcing for different land use types in Northeastern United States. Global Biogeochemical Cycles, 34, e2019GB006520. [PDF]

Li, X.*, Xiao, J. (2019) Mapping photosynthesis solely from solar-induced chlorophyll fluorescence: A global, fine-resolution dataset of gross primary production derived from OCO-2. Remote Sensing, 11(21), 2563; [PDF]

Xiao, J., Chevallier, F., Gomez, C., Guanter, L., Hicke, J.A., Huete, A.R., Ichii, K., Ni, W., Pang, Y., Rahman, A.F., Sun, G., Yuan, W., Zhang, L., Zhang, X. (2019) Remote sensing of the terrestrial carbon cycle: A review of advances over 50 years. Remote Sensing of Environment, 233, 111383. (A review article) [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, [PDF]

Li, X.*, Xiao, J. (2019) A global, 0.05-degree product of solar-induced chlorophyll fluorescence derived from OCO-2, MODIS, and reanalysis data. Remote Sensing, 11, 517. [PDF]

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. (A review article) [PDF]


Group news:



Our perspective article is published in Nature Plants. With emerging satellite observations, we can now study diurnal cycling of plant functioning and ecosystem processes (e.g., GPP, ET, WUE) from space. We also envision that these emerging observations will revolutionize studies of plant functioning and ecosystem processes in the context of climate change and that these observations and findings can inform agricultural and forest management and lead to improvements in Earth system models and climate projections. w/ @jawzsh Hiro Hashimoto @kazuhito_ichii @ncparazoo. [PDF] [view-only version]


Yue's paper titled Exploring diurnal thermal variations in urban local climate zones with ECOSTRESS land surface temperature data is published in Remote Sensing of Environment. This is one of the few earliest urban studies based on ECOSTRESS observations. [PDF]


Jingfeng and Dr. Ge Sun (Forest Service) are funded for studying ecosystem functions of southern forests.

Xiaojuan's paper titled Improving the global MODIS GPP model by optimizing parameters with FLUXNET data is one of the most downloaded Agricultural and Forest Meteorology articles in the last 90 days (as of April 21, 2021). [PDF]


Our global, 0.05-deg SIF and GPP products (GOSIF & GOSIF GPP) are now extended to 2020. The entire datasets (8-day/monthly, 0.05-deg, 2000-2020) are available at our data repository. GOSIF is based on OCO-2 SIF, and GOSIF GPP is derived from GOSIF and SIF-GPP relationships.

Jingfeng gave an invited talk at the FLUXNET Seminar Series on March 5, 2021. The talk is titled Assessing drought impacts on terrestrial photosynthesis with satellite data from OCO-2 and SMAP.

Xing's paper titled ECOSTRESS estimates gross primary production with fine spatial resolution for different times of day from the International Space Station is now published in Remote Sensing of Environment. We can now study the diurnal cycling of plant carbon uptake from space. [PDF]


Haibo's paper titled Improving the capability of the SCOPE model for simulating solar-induced fluorescence and gross primary production using data from OCO-2 and flux towers is now published in Remote Sensing. [PDF]


Xiaojuan's paper titled Improving the global MODIS GPP model by optimizing parameters with FLUXNET data is now published in Agricultural and Forest Meteorology. We optimized parameters and quantified parameter uncertainty for the MODIS GPP model for all vegetation types with data from 110 FLUXNET sites and the MCMC method. It is an effort towards improving the globall MODIS GPP product. [PDF]

Jingfeng has agreed to serve as an associate editor for Ecological Processes, an international, peer-reviewed, open access journal devoted to ecological studies with a focus on the underlying processes of the dynamics and functions of ecological systems at multiple spatial and temporal scales.


More news


Prospective graduate students and postdocs (and visiting students or scholars):

Our group may have positions open for highly-motivated and productive graduate students or postdocs. Please contact me if you are interested. We also host highly-motivated visiting students or scholars.

Special issues:

Carbon flux, water use and surface energy balance of forest plantations, Agricultural and Forest Meteorology, Guest Editors: Xiaojuan Tong, Jingfeng Xiao, M. Altaf Arain (deadline: August 15, 2021)


Afforestation and Reforestation: Drivers, Dynamics, and Impacts, Forests, Guest editors: J. Xiao, G. Sun, L. Hao, G. Dong, Z. Zhang


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