Chuixiang (Tree) Yi

Professor & Fulbright Scholar CV

PhD Faculty in EES Program at GC/CUNY

PhD Faculty in Physics Program at GC/CUNY

School of Earth and Environmental Sciences

Queens College, City University of New York (CUNY)

Phone: (718) 997-3366         E-mail: cyi@qc.cuny.edu


Yi, C., et al., Climate control of terrestrial carbon exchange across biomes and continents,

Environmental Research Letters, 5, doi: 10.1088/1748-9326/5/3/034007, 2010.


  @cyi12 Mastodon

PhD opportunities

Funding opportunities


Key words for Research

Canopy flow and complex terrain

Boundary layer dynamics

Biosphere-atmosphere interaction

Nonlinear Dynamics of Abrupt Climate Change

Theoretical modeling

Numerical modeling

Statistical modeling

Tree mortality and climate change

Forest  resilience and tipping point

Extreme weather and global warming

Climate change and carbon cycling

Regional dendroclimatic reconstruction

FLUXNET data analysis

Tree-ring data analysis



Selected Publications


Yi, C., Nonlinear Sciences and Their Applications to the Geoscience , Meteorological  Press, Beijing, 1995. (In Chinese)

Yi, C, Climate Change and Climate Models, Ocean Publishing House, Beijing, 1993. (In Chinese)


Zhang, Q., C. Yi*, G. Wohlfahrt, D. Chen, M. Rietkerk, Z. Tian, M. Wu, E. Kutter, J. Han, G. Hendrey & S. Xu, 2024, Climate indices as predictors of global soil organic carbon stocks, Geografiska Annaler: Series A, Physical Geography, DOI: 10.1080/04353676.2024.2335000 PDF


Tian*, Z., Yi, C., Fu*, Y., Kutter, E., Krakauer, N. Y., Fang, W., et al. (2023). Fusion of multiple models for improving gross primary production estimation with eddy covariance data based on machine learning. Journal of Geophysical Research: Biogeosciences, 128, 2022JG007122. https://doi.org/10.1029/2022JG007122 PDF


Wohlfahrt*, G., A. Hammerle, F. M. Spielmann, F. Kitz, and C. Yi, Technical note: Novel estimates of the leaf relative uptake rate of carbonyl sulfide from optimality theory, Biogeosciences, 20, 589–596, 2023, https://doi.org/10.5194/bg-20-589-2023. PDF


Yi, C., E. Kutter, 2023. We can’t move mountains: Flow in complex environments, 153 – 185, in Hiscox, A., McCombs, A., Eds., Conceptual Boundary Layer Meteorology: The Air Near Here, 1st Edition, Academic Press, Cambridge, MA USA, 314 pp., ISBN 978-0128170922. (link)


Luo, H., Zhou, T, Yu, P, Yi, C., Liu, X., Zhang, Y., Zhou, P., Zhang, J., Xu, Y. The forest recovery path after drought dependence on forest type and stock volume, 2022 Environ. Res. Lett.17 (2022) 055006  https://doi.org/10.1088/1748-9326/ac57e5 PDF


Yi, C., Hendrey, G.,  Niu,S., McDowell, N.,  Allen, C. D., Tree Mortality in a Warming World: Causes, Patterns, and Implications, Environ. Res. Lett. 17 (2022) 030201 https://doi.org/10.1088/1748-9326/ac507b. PDF

Xu, P., Fang, W., Zhou, T., Li, H., Zhao, X., Berman, S., Zhang, T., Yi, C., Satellite evidence of canopy-height dependence of forest drought resistance in southwestern China, Environ. Res. Lett. 17 (2022) 025005,

https://doi.org/10.1088/1748-9326/ac4a33 PDF

Fang, W., C. Yi, D. Chen, P. Xu, G. Hendrey, N. Krakauer, K. Jensen, S. Gao, Z. Lin, G. Lam, Q. Zhang, T. Zhou, 2021, Hotter and Drier Climate Made the Mediterranean Europe and Northern Africa Region a Shrubbier Landscape, Oecologia, https://link.springer.com/article/10.1007/s00442-021-05041-3. PDF

Manuel Helbig,  Tobias Gerken, Eric Beamesderfer, Dennis D. Baldocchi, Tirtha Banerjee, Sébastien C. Biraud, William O.J. Brown, Nathaniel A. Brunsell, Elizabeth A Burakowski, Sean P. Burns, Brian J. Butterworth, W. Stephen Chan, Kenneth J. Davis, Ankur R. Desai, Jose D. Fuentes, David Y. Hollinger, Natascha Kljun, Matthias Mauder, Kimberly A. Novick, John M. Perkins, David A. Rahn, Camilo Rey-Sanchez, Joseph A. Santanello, Russell L. Scott, Bijan Seyednasrollah, Paul C. Stoy, Ryan C. Sullivan, Jordi Vilà-Guerau de Arellano, Sonia Wharton, Chuixiang Yi, Andrew D. Richardson (2021) Integrating continuous atmospheric boundary layer and tower-based flux measurements to advance understanding of land-atmosphere interactions Agricultural and Forest Meteorology 307 15 September 2021, 108509. PDF

Lupo, A.R.; Chernokulsky, A.V.; Gimeno, L.; Mao, J.; Matzarakis, A.; Tzanis, C.G.; Yi, C. Special Issue: 10th Anniversary of Atmosphere: Climatology and Meteorology. Atmosphere 2021, 12, 681. https://doi.org/10.3390/atmos12060681 PDF

Yi, C, N. Jackson (2021)  A review of measuring ecosystem resilience to disturbance Environ. Res. Lett., 16 053008 https://iopscience.iop.org/article/10.1088/1748-9326/abdf09 PDF

Ramadhin, C., C. Yi, G. R Hendrey (2021) Temperature variance portends and indicates the extent of abrupt climate shifts IOPSciNotes https://iopscience.iop.org/article/10.1088/2633-1357/abda14  PDF

Tian, Z, C. Yi, Y Fu, J. Singer, Q Zhang, (2020) Spatiotemporal analysis of weather effects on COVID-19 pandemic transmissions in select US Counties Journal of Health and Environmental Research 6(4): 104-113, doi: 10.11648/j.jher.20200604.11. PDF

Ma, Y., Liu, H., Banerjee, T., Katul, G. G., Yi, C., & Pardyjak, E. R. (2020). The effects of canopy morphology on flow over a two‐dimensional isolated ridge. Journal of Geophysical Research: Atmospheres, 125, e2020JD033027. https://doi.org/10.1029/2020JD033027. PDF

Gao, S., T. Zhou, C. Yi, P. Shi, W. Fang, R. Liu, E. Liang, J. J. Camareroh, Asymmetric impacts of dryness and wetness on tree growth and forest coverage, Agric. Forest Meteorol., 288–289, 2020, 107980, https://doi.org/10.1016/j.agrformet.2020.107980. PDF

Li, Z., Z. Zeng, D. Tian, J. Wang, Z. Fu, B. Wang, Z. Tang, W. Chen, H. Y H Chen, C. Wang, C. Yi, and S.i Niu, 2020 The stoichiometry of soil microbial biomass determines metabolic quotient of nitrogen mineralization, Environ. Res. Lett. 15 034005, https://iopscience.iop.org/article/10.1088/1748-9326/ab6a26. PDF

Ramadhin, C., and C. Yi, ESD Ideas: Why are glaciations slower than deglaciations? Earth Syst. Dynam., 11, 13–16, 2020, https://doi.org/10.5194/esd-11-13-2020. PDF


Xu, P., W. Fang, T. Zhou, X. Zhao, H. Luo, G. Hendrey, and C. Yi, Spatial upscaling of tree-ring-based forest response to drought with satellite data, Remote Sens. 2019, 11(20), 2344; https://doi.org/10.3390/rs11202344. PDF


Ma, Y., H. Liu, Z. Liu, C. Yi, B. Lamb, 2019, Influence of forest-edge flows on scalar transport with different vertical distributions of foliage and scalar sources, Boundary-Layer Meteorology, 1-19, https://doi.org/10.1007/s10546-019-00475-y, 2019. PDF


Meng, C., D. Tian, H. Zeng, Z. Li, C. Yi, and S. Niu, 2019: Soil acidification impacts on belowground processes: a meta-analysis, Environ. Res. Lett. https://doi.org/10.1088/1748-9326/ab239c (2019). PDF


Ramadhin, C., and C. Yi, 2019: Why are glacial inceptions slower than terminations? Earth Syst. Dynam. Discuss., https://doi.org/10.5194/esd-2019-10.


Burns, S.P., J. Sun, D.H. Lenschow, S.P. Oncley, B.B. Stephens, C. Yi, D.E. Anderson, J. Hu, and R.K. Monson, 2019: Correction to: Atmospheric stability effects on wind fields and scalar mixing within and just above a subalpine forest in sloping terrain. Boundary-Layer Meteorology, doi:10.1007/s10546-019-00436-5, 2019. PDF

Gao, S., R. Liu, T. Zhou, W. Fang, C. Yi, R. Lu, X. Zhao, H. Luo, Dynamic responses of tree-ring growth to multiple dimensions of drought, Global Change Biology, DOI:10.1111/gcb.14367 (2018). PDF

Xu, P., T. Zhou, C. Yi, W. Fang, G. Hendrey, and X. Zhao, Forest drought resistance distinguished by canopy height, Environ. Res. Lett. 13 (2018) 075003 (2018). PDF News

Xu, P., T. Zhou, C. Yi, H. Luo, X. Zhao, W. Fang, S. Gao, X. Liu, Impacts of Water Stress on Forest Recovery and Its Interaction with Canopy Height, Int. J. Environ. Res. Public Health, 15, 1257; doi:10.3390/ijerph15061257 (2018). PDF

Luo, H., T. Zhou, C. Yi, P. Xu, X. Zhao, S. Gao, X. Liu,  Stock volume dependency of forest drought responses in Yunnan, China, Forests, 9(4), 209; doi:10.3390/f9040209 (2018). PDF

Yi, C., G. Mu, G. Hendrey, S. M. Vicente-Serrano, W. Fang, T. Zhou, S. Gao, P. Xu. Bifurcated Response of a Regional Forest to Drought,  Expert Opin Environ Biol, 7:2, 10.4172/2325-9655.1000153 (2018). PDF

Andujar, E., N. Y. Krakauer, C. Yi, F. Kogan, Ecosystem Drought Response Timescales from Thermal Emission versus Shortwave Remote Sensing, Advances in Meteorology, Volume 2017, Article ID 8434020, 10 pages https://doi.org/10.1155/2017/8434020, (2017). PDF

Kutter, E., C. Yi, G. Hendrey, H. Liu, T. Eaton, and W. Ni-Meister, Recirculation over complex terrain, J. Geophys. Res. Atmos., 122, doi:10.1002/2016JD026409 (2017).  PDF

Wei, S., C. Yi, W. Fang, and G. Hendrey. A global study of GPP focusing on light-use efficiency in a random forest regression model. Ecosphere 8(5):e01724. 10.1002/ecs2.1724 (2017). PDF

Xu, X., C. Yi, L. Montagnani, E. Kutter, Numerical Study of the interplay between thermo-topographic slope flow and synoptic flow on canopy transport processes, Agric. Forest Meteorol., doi:10.1016/j.agrformet.2017.03.004. (2017). PDF

Xu, X., C. Yi, and E. Kutter, Stably stratified canopy flow in complex terrain, Atmos. Chem. Phys., 15, 7457-7470, doi:10.5194/acp-15-7457-2015, 2015. PDF

Yi, C., E. Pendall &  P. Ciais, Focus on extreme events and the carbon cycle. Environ. Res. Lett. 10 070201 doi:10.1088/1748-9326/10/7/070201 (2015).

Huang, K., C. Yi, D. Wu, T. Zhou, X. Zhao, W. J. Blanford, S. Wei, H. Wu, D. Ling, and Z. Li, Tipping point of a conifer forest ecosystem under severe drought, Environ. Res. Lett. 10 024011 doi:10.1088/1748-9326/10/2/024011 (2015). Perspective  Highlights

Yi, C., S. Wei &  G. Hendrey, Warming climate extends dryness-controlled areas of terrestrial carbon sequestration. Sci. Rep. 4, 5472; DOI:10.1038/srep05472 (2014).

Wei, S., C. Yi, G. Hendrey, T. Eaton, G. Rustic, S. Wang, H. Liu, N. Y. Krakauer, W. Wang, A. R. Desai, L. Montagnani, K. T. Paw U, M. Falk, A. Black, C. Bernhofer, T. Grünwald, T. Laurila, A. Cescatti, E. Moors, R. Bracho, and R. Valentini, Data-based perfect-deficit approach to understanding climate extremes and forest carbon assimilation capacity, Environ. Res. Lett. 9 065002 (9pp), (2014).

Yi, C., D. Ricciuto, G. Hendrey, Biome Q10 and dryness, the American Journal of Climate Change, 2, 292-295. doi: 10.4236/ajcc.2013.24029, 2013. PDF

Xu, X., C. Yi, the influence of geometry on recirculation and co2 transport over forested hills, Meteorology and Atmospheric Physics, 2012, DOI: 10.1007/s00703-012-0224-6 . PDF

Yi, C., G. Rustic, X. Xu, J. Wang, A. Dookies, S. Wei, G. Hendrey, D. M. Ricciuto, T. Meyers, Z. Nagy, K. Pinter, Climate extremes and grassland potential productivity, Environmental Research Letters, 7, 035703 (6pp) doi:10.1088/1748-9326/7/3/035703, 2012.

Chen, H., and C. Yi, Optimal control of katabatic flows within canopies, Quarterly Journal of the Royal Meteorological Society, DOI:10.1002/qj.1904, 2012. PDF

Wang, W. and C. Yi, A new nonlinear analytical model for canopy flow over a forested hill, Theoretical and Applied Climatology, DOI 10.1007/s00704-012-0599-9, 2012. [PDF]

Wang, S., J. Liu, C. Zhang, C. Yi, W. Wu, Effects of Afforestation on Soil Carbon Turnover in China’s Subtropical Region, J. Geogr. Sci., 21(1), 118-134. 2011.[PDF]

Burns, S.P., J. Sun, D.H. Lenschow, S.P. Oncley, B.B. Stephens, C. Yi, D.E. Anderson, J. Hu, and R.K. Monson, 2010: Atmospheric stability effects on wind fields and scalar mixing within and just above a subalpine forest in sloping terrain. Boundary-Layer Meteorology, doi:10.1007/s10546-010-9560-6, 231-262, 2010. [PDF]

Yi, C., D. Ricciuto, R. Li, J. Wolbeck, X. Xu, M. Nilsson, L. Aires, J. D. Albertson, C. Ammann, M. A. Arain, A. C. de Araujo, M. Aubinet, M. Aurela, Z. Barcza, A. Barr, P. Berbigier, J. Beringer, C. Bernhofer, A. T. Black, P. V. Bolstad, F. C. Bosveld, M. S. J. Broadmeadow, N. Buchmann, S. P. Burns, P. Cellier, J.M. Chen, J.Q. Chen, P. Ciais, R. Clement, B. D. Cook, P. S. Curtis, D. B. Dail, E. Dellwik, N. Delpierre, A. R. Desai, S. Dore, D. Dragoni, B. G. Drake, E. Dufrêne, A. Dunn, J. Elbers, W. Eugster, M. Falk, C. Feigenwinter, L. B. Flanagan, T. Foken, J. Frank, J. Fuhrer, D. Gianelle, A. Goldstein, M. Goulden, A. Granier, T. Grünwald, L. Gu, H. Guo, A. Hammerle, S. Han, N. P Hanan, L. Haszpra, B. Heinesch, C. Helfter, D. Hendriks, L. B. Hutley, A. Ibrom, C. Jacobs, T. Johansson, M. Jongen, G. Katul, G. Kiely, K. Klumpp, A. Knohl, T. Kolb, W. L. Kutsch, P. Lafleur, T. Laurila, R. Leuning, A. Lindroth, H. Liu, B. Loubet, G. Manca, M. Marek, H. A. Margolis, T. A. Martin, W. J Massman, R. Matamala, G. Matteucci, H. McCaughey, L. Merbold, T. Meyers, M. Migliavacca, F. Miglietta, L. Misson, M. Mölder, J. Moncrieff, R. K. Monson, L. Montagnani, M. Montes-Helu, E. Moors, Ch. Moureaux, M. M Mukelabai, J. W. Munger, M. Myklebust, Z. Nagy, A. Noormets, W. Oechel, R. Oren, S. G. Pallardy, K. T. Paw U, J. S. Pereira, K. Pilegaard, K. Pintér, C. Pio, G. Pita, T. L. Powell, S. Rambal, J. T. Randerson, C. von Randow, C. Rebmann, J. Rinne, F. Rossi, N. Roulet, R. J. Ryel, J. Sagerfors, N. Saigusa, M. J. Sanz, G.S. Mugnozza, H. P. Schmid, G. Seufert, M. Siqueira, J. F. Soussana, G. Starr, M. A. Sutton, J. Tenhunen, Z. Tuba, J. P. Tuovinen, R.Valentini, C. S. Vogel, J. Wang, S. Wang, W. Wang, L. R. Welp, X. Wen, S. Wharton, M. Wilkinson, C. A. Williams, G. Wohlfahrt, S. Yamamoto, G. Yu, R. Zampedri, B. Zhao, X. Zhao, Climate control of terrestrial carbon exchange across biomes and continents, Environmental Research Letters, 5, doi: 10.1088/1748-9326/5/3/034007, 2010. [PDF] [Supplementary Data][PPTs-2010-AGU-Fall-Meeting][ERL Highlight of 2010] Norbert Gerbier-MUMM International Award 2012

Yi, C., Instability analysis of terrain-induced canopy flows, Journal of the Atmospheric Sciences, 66, 2134-2142, doi:10.1175/2009JAS3005.1, 2009.[PDF]

Eaton, T. T., C. Yi, Hydroperiod and hydraulic loading for treatment potential in urban tidal wetlands, Hydrol. Earth Syst. Sci. Discuss., 6, 589–625, 2009. [PDF]

Yi, C., Momentum transfer within canopies, Journal of Applied Meteorology and Climatology, 47, 262-275, doi:10.1175/2007JAMC1667.1, 2008. [PDF]

Zhou, T., C. Yi, P. S. Bakwin, and Li Zhu, Links between global CO2 variability and climate anomalies of biomes, Science China, Ser D-Earth Sci,. 51, 740-747, 2008. [PDF]

Yi, C.,  D. E. Anderson, A. A. Turnipseed, S. P. Burns, and J. Sparks, D. Stannard, and K. R. Monson, The contribution of advective fluxes to net ecosystem CO2 exchange in a high elevation, subalpine forest ecosystem, Ecological Applications, 18 (6), 1379-1390, 2008. [PDF] APPENDIX

Denning, A.S., N. Zhang, C. Yi, M. Branson, K. Davis, J. Kleist, and P. Bakwin, Evaluation of modeled atmospheric boundary layer depth at the WLEF Tower, Agricultural and Forest Meteorology, 148, 206-215, 2008.[PDF]

Wang W., K J. Davis, B. D. Cook, C. Yi,  M. P. Butler, D. M. Ricciuto, and P. S. Bakwin, Estimating daytime CO2 fluxes over a mixed forest from tall tower mixing ratio measurements, Journal of Geophysical Research, 112, D10308, doi:10.1029/2006JD007770, 2007.[PDF]

Wang W., K J. Davis, C. Yi, E. G. Patton, M. P. Butler, D. M. Ricciuto, and P. S. Bakwin, A note on the top-down and bottom-up gradient functions over a forested site, Boundary-Layer Meteorology, 124:305–314, DOI 10.1007/s10546-007-9162-0, 2007.[PDF]

Yi, C., R. K. Monson, Z. Zhai, D. E. Anderson, B. Lamb, G. Allwine, A. A. Turnipseed, and S. P. Burns, Modeling and measuring the nocturnal drainage flow in a high-elevation, subalpine forest with complex terrain, Journal of Geographical Research, 110, D22303, doi:10.1029/2005JD006282, 2005. [PDF]

Wang, W., K.J. Davis, B.D. Cook, P.S. Bakwin, C. Yi, D. Ricciuto, and M. Butler, Surface layer CO2 budget and advective contributions to measurements of net ecosystem-atmosphere exchange of CO2, Agriculture and Forest Meteorology, 2005, 135, 202-214.[PDF]

Yi, C., R. Li, P. S. Bakwin, A. Desai, D. M. Ricciuto, S. P. Burns, A. A. Turnipseed, S. C. Wofsy, J. W. Munger, K. Wilson, and R. K. Monson, A nonparametric method for separating photosynthesis and respiration components in CO2 flux measurements, Geophysical Research Letters, 31, L17107, doi:10.1029/2004GL020490, 2004. [PDF]

Yi, C., K. J. Davis, P. S. Bakwin, A.S. Denning, N. Zhang, A. Desai, J. C. Lin, and C. Gerbig, The observed covariance between ecosystem carbon exchange and atmospheric boundary layer dynamics at a site in northern Wisconsin, Journal of Geophysical Research, 109, D08302, doi:10.1029/2003JD004164, 2004. [PDF]

Hurwitz, M.D., D.M. Ricciuto,  P.S. Bakwin, K.J. Davis, W. Wang, C. Yi, and M.P. Butler, Transport of Carbon Dioxide in the Presence of Storm Systems over a Northern Wisconsin Forest, Journal of the Atmospheric Sciences, 61, 607-618, 2004. [PDF]

Cook, B.D., K.J. Davis, W. Wang, A. Desai, B.W. Berger, R.M. Teclaw, J.G. Martin, P.V. Bolstad, P.S. Bakwin, C. Yi, and W. Heilman, Carbon exchange and venting anomalies in an upland deciduous forest in northern Wisconsin, USA, Agricultural and Forest Meteorology, 126, 271-295, 2004.[PDF]

Bakwin, P.S., K.J. Davis, C. Yi, S.C. Wofsy, J.W. Munger, L. Haszpra and Z. Barcza, Regional carbon dioxide fluxes from mixing ratio data, Tellus 56B, 301-311, 2004. [PDF]

Davis, K.J., P.S. Bakwin, C. Yi, B.W. Berger, C. Zhao, R.M. Teclaw and J.G. Isebrands, Long-term carbon dioxide fluxes from a very tall tower in a northern forest: Annual cycle of CO2 exchange, Global Change Biology, 9, 1278-1293, 2003. [PDF]

Werner, C., K.J. Davis, P. Bakwin, C. Yi, D. Hurst, and L. Lock, Interannual variability of methane exchange over a temperate-boreal lowland and wetland forest, Global Change Biology, 9, 1251-1261, 2003. [PDF]

Zhou T., C. Yi, P. Shi, Relationship between NDVI and climatic factors under different drought conditions, Acta Geographica Sinica, 58, 512-518, 2003. (In Chinese with English abstract)

Zhou T., C. Yi, P. Shi, and J. Luo, Research on the feedback mechanism between terrestrial carbon cycle and temperature, Geographical Research, 21, 53-59, 2002. (In Chinese with English abstract) [PDF]

Yi, C., K. J. Davis, B. W. Berger, P. S. Bakwin, Long-term observations  of the dynamics of the continental planetary boundary layer, Journal of  the  Atmospheric Science, 58, 1288-1299, 2001. [PDF]

Berger, B. W., K. J. Davis, C. Yi, P. S. Bakwin, and C. Zhao, Long-term carbon dioxide fluxes from a very tall tower in a northern forest: Part  I. Flux measurement methodology, Journal of Atmospheric and Oceanic Technology , 18, 529-542, 2001. [ PDF]

Yi, C., P. Gong, M. Xu , and Y. Qi , The effects of buffer and temperature feedback on the oceanic uptake of CO2, Geophysical Research Letters , 28, 751-754,  2001. [PDF]

Yi, C., K. J. Davis, P. S. Bakwin, B. W. Berger, and L. Marr,  The influence of advection on measurements of the net ecosystem-atmosphere exchange of   CO2 from a very tall tower, Journal of Geophysical Research , 105, 9991-9999, 2000. [PDF]

Yi, C., Kaiyu Liu, and Tao Zhou, Research on a formula of rainfall interception by vegetation, Journal of Soil Erosion and Soil and Water Conservation, 2 , 77-79, 1996. (In Chinese with English abstract)

Yi, C., Kaiyu Liu, and Tao Zhou, A model for calculating soil moisture fields in the monsoon region of the eastern part of China, Journal of Soil Erosion and Soil and Water Conservation, 2, 80-85, 1996.  (In Chinese with English abstract)

Yi, C., Kaiyu Lui, and Tiangjie Li, Research on relations of soil zonal distributions with climate in the monsoon region of the eastern part of China, Acta Pedologica Sinica , 32, 385-390, 1996. (In Chinese with English abstract)

Yi, C., On land surface dynamics, Chinese Journal of Applied Ecology, 6, 212-219, 1995. (In Chinese with English abstract)

Yi, C., Approach on applying the nonlinear theories to formulate a synthetical theory of environment and ecology, Advance in Earth Science, 10, 164-168, 1995. (In Chinese with English abstract )

Yi, C., A catastrophe model of debris flow, Journal of Nature Disasters, 4, 53-57,1995. (In Chinese with English abstract)

Yi, C., Peijun Shi, On the natural disaster model, Journal of Nature Disasters, 4, 6-8, 1995. (In Chinese with English abstract)

Yi, C., and Shi Peijun, Entropy Production and Natural Hazards, Journal of Beijing Normal University , Natural Science Ed., 30, 276-280, 1994. (In Chinesewith English abstract )

Yi, C. and Rongsheng Wu, A Self-Organization Climate Model, Chinese Journal of Atmospheric Science, 18, 129-140, 1994.