International Journal of Ecosystem

The International Journal of Ecosystem (IJE) is a peer-reviewed journal publishes papers from original research in all areas of ecosystem structure and function as impacted by the changes in climate and land and water use and management practices in a given environment. In the aforementioned context the characterization of ecosystem structural components as community of plants, animals and smaller organisms that live, feed, reproduce and how they interact with each other in the same area or environment, their interdependency are essential for the improved understanding of the functioning of the structural components. The modifications in the structural components as impacted by human imposed changes and/or linked to climate changes are poorly understood and/or are not recorded after rigorous review. In aforementioned context the IJE provides a forum for discussion in the modifications in ecosystem structural components and the associated functions around the world, particularly from developing countries, aimed at the sustainable use of natural resources. Critical review articles are also welcome.


Jianjun Xu

Editorial Board Member of International Journal of Ecosystem

Professor, College of Science, George Mason University, USA

Research Areas

Atmospheric Sciences and Climatology

Education

1997Ph.DRegional Climate and Air-Sea Interaction, Department of Meteorology, Nanjing Institute of Meteorology, China
1989M.SClimate Dynamics, Department of Atmospheric science, Nanjing University, China
1986B.SAtmospheric Science, Department of Atmospheric science, Nanjing University, China

Experience

2011-presentResearch Professor, College of Science, George Mason University, USA
2009-2011Atmospheric Scientist, IMSG at National Environmental Satellite, Data, and Information service (NESDIS)/Center for Satellite Applications and Research (STAR), USA
2007-2009Project Scientist II, Air Force Weather Agency (AFWA) Scientific Liaison to Joint Center for Satellite Data Assimilation (JCSDA), USA
2004-2007Visiting Scientist, physical working in Joint Center for Satellite Data Assimilation/NOAA, NASA and DoD (e.g. AFWA and NAVY), USA
2002-2004Research Associate, Hydrometeorology Program, Dept. of Hydrology and Water Resource, University of Arizona, USA
2000-2002Postdoctoral Researcher, Hydrometeorology Program, Dept. of earth and environmental science, New Mexico Institute of Mining & Technology, USA
1998-2000Research Fellow, Atmospheric Science Program, Dept. of physics & materials science, City university of Hong Kong, Hong Kong
1997-1998Associate Professor, State Key Lab. of Numerical Modelling for Atmospheric Fluid Dynamics (LASG), Institute of Atmospheric Physics, Chinese Academy of Science, China

Membership

American Meteorological Society, USA
American Geophysical Union, USA

Publications: Conferences/Workshops/Symposiums/Journals/Books

[1]  Powell, A and J Xu, 2010: Comparisons of Temperature Response to Solar Forcing in the Pre-and Post Periods of Satellite Data Assimilation. International Journal of Climatology, Published online in Wiley Online Library (wileyonlinelibrary.com) DOI: 10.1002/joc.2239
[2]  Powell, A and J Xu, 2010: A New Assessment of the Mid-1970s Abrupt Atmospheric Temperature Change in the NCEP/NCAR Reanalysis and Associated Solar Forcing Implications. Theoretical and Applied Climatology, DOI 10.1007/s00704-010-0344-1
[3]   Powell, A and J Xu, 2010: An investigation of the relationship between the equatorial quasi-biennial oscillation, the Arctic stratosphere and solar forcing. Journal of Atmospheric and Solar-Terrestrial Physics, 1354-1363, doi:10.1016/j.jastp.2010.09.024
[4]  Xu, J and A Powell, 2010: Ensemble Spread and Its Implication for the Evaluation of Temperature Trends from Multiple Radiosondes and Reanalyses Products. Geophy. Res. Letter, 37, L17704, doi:10.1029/2010GL044300.
[5]   Powell, A, J Xu, and M Chen, 2010: Regime Shifts in the Atmosphere and Their Relationship to Abrupt Ocean Changes. F. Kogan et al. (eds.), Use of Satellite and In-Situ Data to Improve Sustainability, NATO Science for Peace and Security Series C: Environmental Security, DOI 10.1007/978-90-481-9618-0_17.
[6]  Wan, Q. and J Xu, 2011: A numerical study of the rainstorm characteristics of the June 2005 flash flood with WRF/GSI data assimilation system over south-east China. Hydrological Processes, 25, 1327-1341 (2011) DOI: 10.1002/hyp.7882
[7]  Powell, A and J Xu, 2011: Possible Solar Forcing of Interannual and Decadal Stratospheric Planetary Wave Variability in the Northern Hemisphere: An Observational Study. Journal of Atmospheric and Solar-Terrestrial Physics, DOI: 10.1016 /j.jastp.2011.02.001
[8]  Powell, A and J Xu, 2011: Abrupt Regime Shifts, Their Potential Forcing and Fisheries Impacts. Atmosphere and Climate Science. 2011, 1, 33-47 doi:10.4236/acs.2011.12004
[9]  Xu, J and A Powell, 2011: Uncertainty Estimates in Stratospheric/Tropospheric Temperature Trends: Multiple Satellite MSU, Radiosonde, and Reanalysis Datasets from 1979. Atmospheric Chemistry and Physics. 11, 1-16, 2011, www.atmos-chem-phys-discuss.net/11/1/2011/doi:10.5194/acpd-11-1-2011
[10]  Powell, A and J Xu, 2010: Evaluation of the Temperature Trend and Climate Forcing in the Pre-and Post Periods of Satellite Data Assimilation. Submitted to Chapterbook
[11]   Xu, J and A Powell, 2011: Assessing Uncertainties in the Global Temperature Variability for Multiple Radiosonde Datasets, Reanalysis Products and CMIP3/IPCC Climate Model Simulations. Submitted to Tellus. In reviewing.
[12]   Powell, A and J Xu, 2011: Assessment of the Relationship between the Combined Solar Cycle/ENSO Forcings and the Tropopause Temperature, Journal of Atmospheric and Solar-Terrestrial Physics In reviewing.
[13]  Powell, A and J Xu, 2011: The 1977 Global Regime Shift: A Discussion of Its Dynamics and Impacts in the Eastern Pacific Ecosystem, Dynamics of Atmospheres and Oceans. In reviewing
[14]  Xu, J and A Powell, 2011: What Happened to Surface Temperature with Sunspot Activity in the Past 130 Years? Global and Planetary Change, In reviewing
[15]  Xu, J and A Powell, 2011: Dynamical Downscaling Precipitation over the Southwest Asian: Impacts of Radiance Data Assimilation on the Hindcasts of the WRF-ARW Model, Atmospheric Research. In reviewing
[16]  Wan Q. and J Xu, 2010: A numerical study of the rainstorm characteristics of the June 2005 flash flood with WRF/GSI data assimilation system over south-east China. Hydrological Processes, Published online in Wiley Online Library (wileyonlinelibrary.com) DOI: 10.1002/hyp.7882
[17]  Xu J., S. Rugg, M. Horner, and L. Byerle, 2009: Weather Forecasts by the WRF-ARW Model with the GSI Data Assimilation System in the Complex Terrain Areas of Southwest Asia, Weather and Forecasting, 24, 987-1008
[18]  Xu J., S. Rugg, L. Byerle and Z. Liu 2009: Application of ATOVS radiance with ARW WRF/GSI data assimilation system in the prediction of Hurricane Katrina. Open Atmos. Sci. J., 3, 13-28.
[19]  Wan Q., J Xu 2009: IMPACTS OF ATOVS DATA ASSIMILATION ON PREDICTION OF A RAINSTORM OVER SOUTHEAST CHINA, J. Tropical Meteorology. 1006-8775(2009) 01-0155-07
[20]   Xiao X, D Wang, J Xu, 2006: The assimilation experiment in the southwestern of South China Sea in summer 2000, Chinese Science Bulletin, 51(supp. II), 31-37.
[21]  Xu, J, J Shuttleworth, X Gao, S Sorooshian, and E Small, 2004: Soil Moisture-Precipitation Feedback on the North American Monsoon System in the MM5/OSU Model. Quarterly Journal of the Royal Meteorological Society, 130, 2873-2890, Doi:10.1256/qj.03.192.
[22]  Xu, J, X Gao, S Sorooshian, 2004: Influence of Soil Moisture Anomaly on the Seesaw of Summertime Precipitation in Southern United States. Tellus A, 56A, 514-519.
[23]  Xu, J, X Gao, J Shuttleworth, S Sorooshian, and E Small, 2004: Model Climatology of the Seasonal development of the North American Monsoon During 1980-2001. Journal of Climate, 17, 3892-3906.
[24]  Xu, J and E Small, 2002: Simulating summertime rainfall variability in the North American monsoon region: The influence of convection and radiation parameterisations. Journal of Geophysical Research, 107 (D23), 2001JD002047.
[25]  Xu, J, X Gao, and S Sorooshian, 2006: The Influence of Assimilating Rainfall Derived from WSR-88D Radar on the Rainstorm Forecasts over the South western United States. Journal of Geophysical Research, 111, D13105, doi: 10.1029/2005JD006650
[26]  Xu, J, X Gao, Q Xiao and S Sorooshian, 2004: Investigate the Impacts of Assimilating Satellite Rainfall Estimates on Rainstorm Forecast over Southwest United States. Geophysical Research Letters, 31, Doi:10.1029/2004GL020120.
[27]  Gao, X, S Sorooshian, J Li and J Xu, 2003: SST Data improve modelling of North American Monsoon rainfall. Eos, 84 (43), P457, 462.
[28]  Xu, J and J C L Chan, 2002: Relationship between the Planetary-Scale Circulation over East Asia and the Intensity of the South Asian Summer Monsoon. Geophysical Research Letters, 29, 10.1029/2002GL014918.
[29]  Chan, J C L, W Ai, and J Xu, 2002: Mechanisms responsible for the maintenance of the 1998 South China Sea summer monsoon. Journal of the Meteorological Society of Japan, 80, 1103-1113.
[30]  Xu, J and J C L Chan, 2001: First transition of Southeast-South Asian summer monsoon in 1998 and the effect of the Tibet-tropical Ocean thermal contrast. Journal of the Meteorological Society of Japan, 79, 241-253.
[31]  Xu, J and J C L Chan, 2001: The role of Asian/Australian monsoon in the onset time of the El Niño events. Journal of Climate, 14, 418-433.
[32]  Xu, J, and J C L Chan, 2001: The interdecadal and interannual variation of winter rainfall over China. Advance in Atmospheric Sciences, 18, 267-276.
[33]  Chan, J C L and J Xu, 2000: Physical mechanisms responsible for the transition from a warm to a cold state of the El Niño/Southern Oscillation. Journal of Climate, 13, 2056-2071.
[34]  Chan, J C L, Y Wang and J Xu, 2000: Dynamic and thermodynamic characteristics associated with the onset of the 1998 South China Sea summer monsoon. Journal of the Meteorological Society of Japan, 78, 367-380.
[35]  Xu, J, D Wang, 2000: The diagnosis and numerical study of the effect of ENSO and interdecadal variation on Asian monsoon. Acta Oceanic. Sinica., 22, 34-43.
[36]  Xu, J, Q Zhu, 1999: Numerical modelling the effect of ENSO and interdecadal variation Asian summer monsoon circulation. Chinese J. Atmos. Sci, 23, 214-226.
[37]  Xu, J, Q Zhu and T Zhou, 1999: Abrupt Variation of East-Asian Winter Monsoon and its Periodic Property In the Recent Century. Quar. Appl. Meteor., 11, 85-92.
[38]  Xu, J, Q Zhu, 1999: Numerical modelling the effect of ENSO and interdecadal variation precipitation over the global and Asian monsoon area. Acta Mete. Sinica, 57, 302-314.
[39]  Xu, J and G Wu, 1999: Dynamic Features and Maintenance Mechanism of Asian summer Monsoon Subsystem. Advance in Atmospheric Sciences, 16, 523-536.
[40]  Wang, D, G Wu and J Xu, 1999: The interdecadal variability of tropical Indian Ocean and its dynamics. Chinese Science Bulletin, 44, 1620-1626.
[41]  Xu, J, Q Zhu and T Zhou, 1998: Monsoon circulation and its phase locking to ENSO cycle. Advance in Atmospheric Sciences, 15, 267-276.
[42]  Xu, J, Q Zhu and Z Sun, 1998: Interrelation between East-Asian Winter Monsoon and Indian/Pacific SST with the Interdecadal Variation. Acta Mete. Sinica, 12, 275-287.
[43]  Xu, J, Q Zhu, 1998: Possible connection between east Asian winter monsoon QBO and ENSO cycle. J. Nanjing Inst. Meteor., 21, 223-230.
[44]  Xu, J, Q Zhu and T Zhou, 1998: East monsoon variation and its relation to summer precipitation in China. J. Nanjing Inst. Meteor., 21, 82-90.
[45]  Zhu, Q, J Xu, 1998: Effect of ENSO and interdecadal variation on climatic anomaly in the east area of China. J. Nanjing Inst. Meteor., 21, 70-78
[46]  Xu, J, Q Zhu, 1998: The periodical oscillation and interdecadal variation in SST over Indian-Pacific Ocean. J. tropical Meteor., 14, 31-39.
[47]  Xu, J, Q Zhu, 1998: Climatic mode in SST over Indian-Pacific ocean and its interdecadal variation. Ocean prediction, 5, 10-16.
[48]  Xu, J, Q Zhu, 1998: The interannual and interdecadal variation of equatorial Pacific SST in the past century and its relation to global warming. J. Nanjing Inst. Meteor., 21, 101-109
[49]  Xu, J, Q Zhu and N Shi, 1997: East-Asian Winter Monsoon-ENSO Cycle Relation with Interdecadal Anomaly In the Past 100 Years. Chinese J. Atmos. Sci., 21, 325-331
[50]  Xu, J, Q Zhu and N Shi, 1997: The Singular Spectral Analysis of Periodic Oscillation in long-term Variation of East-Asian Monsoon in Recent Century. Acta Mete. Sinica, 54, 620-627.
[51]  Guan, Z, J Xu and C Ha, 1997: The structure and variations of Asian summer monsoon revealed by barotropic and baroclinic modes: the barotropic characteristics. Acta Mete. Sinica, 54, 513-520.
[52]  Guan, Z, J Xu and P Guo, 1997: The structure and variations of Asian summer monsoon revealed by barotropic and baroclinic modes: the baroclinic characteristics. Acta Mete. Sinica, 54, 146-153.
[53]  Guo, P, J Xu, 1996: Propagation of stationary wave on time mean flow and its refraction in multi-direction. J. Nan. Ins. Meteor., 19, 110-118
[54]  Xu, J, Q Zhu and N Shi, 1996: A review of interdecadal climatic variation. J. Nanjing Inst. Meteor, 9, 135-145
[55]  Wang, P, J Xu, 1995: The seasonal variation of monsoon circulation and its relation to El-Nino. Quar. Appl. Meteor., 6, 20-29.
[56]  Xu, J, 1994: Statistical regression analysis of response of northern mid-upper troposphere circulation to winter Eurasian snow cover affects. Advance in Atmospheric Sciences, 11, 415-420.
[57]  He, J, J Xu, Y, Zhang, 1994: Asia-Pacific winter LFO structure and low frequency vortex activity features. Acta. Mete. Sinica, 8, 431-438
[58]  Guan, Z, J Xu, P Wang, 1994: Odd and even symmetry of atmospheric circulation, part I: Theoretical basis and climate characteristics. Acta Mete. Sinica, 8, 140-148.
[59]  Wang, P, Guan Z, J Xu, 1994: Odd and even symmetry of atmospheric circulation part II: Measurement and Anomaly analysis. Acta Meta. Sinica, 8, 201-209
[60]  Xu, J, J He, W Zhu and J Wang, 1994: Moisture transportation analysis of seasonal mean and intraseasonal oscillation in Asian summer monsoon. Acta. Oceano Sinica, 16, 48-54.
[61]  Xu, J, J He and Z Guan, 1994: Seasonal mean and low-frequency structure for water transportation in Asian summer monsoon system. J. Nan. Ins. Meteor., 17, 338-340.
[62]  Wang, P, H Wu, J Xu, 1994: The direction display of complex empirical orthogonal function analysis. J. Nan. Ins. Meteor., 17, 15-22
[63]  Xu, J, J He, 1993: Role in moisture transportation of seasonal mean and intraseasonal oscillations in Asian summer monsoon area long-time average characteristic. Acta Mete. Sinica, 7, 347-354.
[64]  Xu, J, 1993: Quasi-40 day oscillation and its teleconnection structure together with the possible dependence on conversion of barotropic un stable energy of time mean flow. Advance in Atmospheric Sciences, 10, 193-200.
[65]  Pan, Y, J Lu, J Xu, 1993: Tropical convective activity and dual-clement state with anomaly in the El-Nino year. J. Nan. Ins. Meteor., 16, 283-287.
[66]  Wang, P, and J Xu, 1993: A complex empirical orthogonal function analysis of the propagation of Quais-40 day oscillation along assigned routes. Quar. Appl. Meteor., 4 (sup.), 39-44.
[67]  Wang, G, and J Xu, 1993: The relationship between principal components of geopotential height and barotropic energy conversion in winter. Quar. Appl. Meteor., 4, 434-439.
[68]  Xu, J, J He, 1993: The distribution of E vector about summer LFO and its related time mean flow. Acta Mete. Sinica, 51, 103-109.
[69]  Xu, J, G Wang, 1993: Propagation path and maintenance of low-frequency oscillation from observations. J. Nan. Ins. Meteor., 16, 314-318.
[70]  Xu, J, and G Zhu, 1993: The special property of kinetic energy of 30-50 day oscillation and its relationship to the barotropic instability of basic flow. Quar. Appl. Meteor., 4, 192-197.
[71]  Lin, C, J Xu, 1993: Propagations of oscillation for quasi-40 day period in the tropical and extratropical belt in winter and their interrelation. The collected works of Atmospheric Science research, published by Nanjing University, 332-342.
[72]  He, J, J Xu, 1993: Characteristics of the energy structure of low-frequency fluctnations and their relations with westerlies in northern hemisphere. J. tropical. Meteor., 9, 28-36.
[73]  Xu, J, and P Wang, 1992: Seasonal variation of cross-equatorial flow in the eastern Hemisphere and its anomaly during the El Nino event. J. Nan. Ins. Meteor., 15, 37-44.
[74]  Xu, J, J He, 1992: Summer winds quais-40 day oscillation and its fluctuation characteristics. J. Nan. Ins. Meteor., 15, 358-367.
[75]  Xu, J, C Lin, 1992: Diagnostic analysis of 1981-1982 the action of zonal asymmetry barotropic instability on 30-50 day oscillation. J. tropical Meteor., 7, 121-126.
[76]  Lu, J, J Xu, 1992: Eurasian snow cover and its teleconnection to precipitation in the east China. The collected works of long-term forecasts for solar/land interaction, published by China Ocean Press, 62-69.
[77]  Xu, J, J Lu, 1992: Precipitation over the Tibetan Plateau in summer and its association with the Eurasian snow cover. J. Nan. Ins. Meteor., 15, 518-524.
[78]  Xu, J, J He, 1992: Time/space variation of sea ice and its relation to the motion of trough-ridge in northern Hemisphere winter. Sci. Meteor. Sinica, 12, 154-162.
[79]  Xu, J, C Lin, 1991: The activity and evolutional characteristics of low frequency oscillation in flow fields in southern winter. J. tropical Meteor., 7, 275-281.
[80]  Lin, C, J Xu, 1991: Quasi-40 day oscillation of Asian summer monsoon and its relation to the southern China rainfall. Acta Oceano Sinica, 13, 489-499.
[81]  Xu, J, Lin C, 1991: Teleconnection and time variation of 30-50 day oscillation of the 500 hPa height field during July-September. J. Nan. Ins. Meteor., 14, 180-185.
[82]  Wang, P, J Xu 1991: An experiment of the EOF analysis method. J. Nan. Ins. Meteor., 14, 455-460.
[83]  Xu, J, Lin C, 1990: Diagnostic analysis of 30-50 day oscillation Kinetic energy variation and maintenance mechanism. J. tropical Meteor., 6, 324-331.