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.

 

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Highlights on recent papers:

Li, X.*, Xiao, J., He, B. (2018) Higher absorbed solar radiation partly offset the negative effects of water stress on the photosynthesis of Amazon forests during the 2015 drought. Environmental Research Letters, 13, 044005, https://doi.org/10.1088/1748-9326/aab0b1. [PDF] [Supplementary material]

Li, X.*, Xiao, J., He, B. (2018) Chlorophyll fluorescence observed by OCO-2 is strongly related to gross primary productivity estimated from flux towers in temperate forests. Remote Sensing of Environment, 204, 659-671. [PDF]

Liu, Y.*, Xiao, J., Ju, W., Zhu, G., Wu, X., Fan, W., Li, D., Zhou, Y. (2018) Satellite-derived LAI products exhibit large discrepancies and can lead to substantial uncertainty in simulated carbon and water fluxes. Remote Sensing of Environment, 206, 174-188. [PDF]

Wang, X.*, Xiao, J., Li, X., Cheng, G., Ma, M., Che, T., Dai, L., Wang, S., Wu, J. (2017) No consistent evidence for advancing or delaying trends in spring phenology on the Tibetan Plateau. Journal of Geophysical Research: Biogeosciences, 122, 3288–3305, DOI: 10.1002/2017JG003949. [PDF]

Lu, W.*, Xiao, J., Liu, F., Zhang, Y., Liu,C., Lin, G. (2017) Contrasting ecosystem CO2 fluxes of inland and coastal wetlands: A meta-analysis of eddy covariance data. Global Change Biology, 23, 1180-1198, doi: 10.1111/gcb.13424. [PDF]

Liu, Y.*, Xiao, J., Ju, W., Xu, K., Zhou, Y., Zhao, Y. (2016) Recent trends in vegetation greenness in China significantly altered annual evapotranspiration and water yield. Environmental Research Letters, 11, 094010, doi:10.1088/1748-9326/11/9/094010. [PDF]

 

Group news:

2018:

April:

Our new manuscript led by Xing is accepted by Global Change Biology. This study reveals the relationship between chlorophyll fluorescence and photosynthesis at the ecosystem scale across a wide variety of biomes globally for the first time using observations from OCO-2 and flux towers. This is a pioneering study. It demonstrates the potential of finer-resolution chlorophyll fluorescence from OCO-2, TROPOMI, and FLEX in ecosystem functioning and carbon cycling studies.

February:

Xing's paper has been accepted by Environmental Research Letters. Our study shows that the reduction in photosynthesis of Amazon forests during the 2015 drought was partly offset by higher absorbed solar radiation.

January:

Xufeng's paper titled No consistent evidence for advancing or delaying trends in spring phenology on the Tibetan Plateau is published in Journal of Geophysical Research: Biogeosciences today.

2017:

December:

Yibo's manuscript is pubished in Remote Sensing of Environment. Our study demonstrates that satellite-derived leaf area index (LAI) products exhibit large discrepancies and can also lead to substantial uncertainty in carbon and water fluxes simulated by terrestrial biosphere models.

Jingfeng, Xing, Haibo, and Xiaojuan attended the AGU Fall Meeting in New Orleans. Jingfeng chaired two sessions and also presented recent results on urban heat island. Xing presented recent findings on solar-induced chlorophyll fluorescence. Haibao introduced recent work on parameter estimation.

Xufeng's manuscript on phenology has been accepted by JGR: Biogeosciences. The major finding of the study is that there is no consistent evidence for advancing or delaying trends in spring phenology on the Tibetan Plateau. Our study helps settle a long-term debate on spring phenology on the Tibetan Plateau.

November:

Jingfeng attended the review committee meeting of the 2nd State of Carbon Cycle Report (SOCCR-2) at the National Academy of Sciences. SOCCR-2 will be a timely and valuable report on the current status of the North American carbon cycle. It has been great to serve on this committee.

Xing presents his recent work on the photosynthesis of Amazon forests in response to drought at the 11th Graduate Climate Conference at Woods Hole, MA (November 10-12).

October:

We had a group visit to the White Mountains on a sunny, warm day in mid-October. This is a good time to see fall foliage.

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:

Afforestation and Reforestation: Drivers, Dynamics, and Impacts, Forests, Guest editors: J. Xiao, G. Sun, L. Hao, G. Dong, Z. Zhang (deadline: July 25, 2018)

 

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