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Satellite remote sensing reveals overwhelming recovery of forest from disturbances in asia

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Atmospheric and Oceanic Science Letters 2025年第1期18卷 46-51页

作者： Yiying Zhu Hesong Wang Anzhi Zhang School of Ecology and Nature Conservation Beijing Forestry UniversityBeijingChina key laboratory of regional climate and environment for temperate east asia Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina College of Forestry and Landscape Architecture Xinjiang Agricultural UniversityUrumqiChina

Forest ecosystems play key roles in mitigating human-induced climate change through enhanced carbon uptake;however,frequently occurring climate extremes and human activities have considerably threatened the stability of *** the same time,detailed accounts of disturbances and forest responses are not yet well quantified in *** study employed the Breaks For Additive Seasonal and Trend method-an abrupt-change detection method-to analyze the Enhanced Vegetation Index time series in east asia,South asia,and Southeast *** approach allowed us to detect forest disturbance and quantify the resilience after *** showed that 20%of forests experienced disturbance with an increasing trend from 2000 to 2022,and Southeast asian countries were more severely affected by ***,95%of forests had robust resilience and could recover from disturbance within a few *** resilience of forests suffering from greater magnitude of disturbance tended to be stronger than forests with lower disturbance *** summary,this study investigated the resilience of forests across the low and middle latitudes of asia over the past two *** authors found that most forests exhibited good resilience after disturbance and about two-thirds had recovered to a better state in *** findings of this study underscore the complex relationship between disturbance and resilience,contributing to comprehension of forest resilience through satellite remote sensing.

关键词： Forest ecosystem Enhanced vegetation index Breaks for additive seasonal and trend method Disturbance Resilience

Increase in the variability of terrestrial carbon uptake in response to enhanced future ENSO modulation

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Atmospheric and Oceanic Science Letters 2025年第01期 34-40页

作者： Younong Li Li Dan Jing Peng Qidong Yang Fuqiang Yang key laboratory of regional climate-environment for temperate east asia Institute of Atmospheric Physics Chinese Academy of Sciences key laboratory of Atmospheric environment and Processes in the Boundary Layer over the Low-Latitude Plateau Region Department of Atmospheric Science Yunnan University

ENSO是中低纬度地区气候系统的主要驱动因素,对陆地碳循环有重要影响.本研究基于10个CMIP6地球系统模式,分析了不同情景下ENSO变率与中低纬度地区总初级生产力变率的关系.结果显示,未来ENSO变率和总初级生产力变率在未来多数模式均显示... 详细信息

ENSO是中低纬度地区气候系统的主要驱动因素,对陆地碳循环有重要影响.本研究基于10个CMIP6地球系统模式,分析了不同情景下ENSO变率与中低纬度地区总初级生产力变率的关系.结果显示,未来ENSO变率和总初级生产力变率在未来多数模式均显示为增加.在未来情境下(2051-2100年),中低纬度地区的总初级生产力变率较历史时期(1951–2000年)增加了30.9%(SSP2-4.5), 58.2%(SSP5-8.5).进一步分析表明, ENSO主要通过温度影响中低纬度碳通量变率.这种现象可能归因于总初级生产力对温度的响应增强,以及ENSO对陆地表面温度的影响.

关键词：总初级生产力 ENSO变率 CMIP6

The Interactive climate and Vegetation Along the Pole-Equator Belts Simulated by a Global Coupled Model

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Advances in Atmospheric Sciences 2007年第2期24卷 239-249页

作者：丹利季劲钧李银鹏 START regional Center for temperate east asia and key laboratory of regional climate-environment for temperate east asia Institute of Atmospheric Physics Chinese Academy of Sciences

The interaction between climate and vegetation along four Pole-Equator-Pole （PEP） belts were explored using a global two-way coupled model, AVIM-GOALS, which links the ecophysiological processes at the land surface with the general circulation model （GCM）. The PEP belts are important in linking the climate change with the variation of sea and land, including terrestrial ecosystems. Previous PEP belts studies have mainly focused on the paleoclimate variation and its reconstruction. This study analyzes and discusses the interaction between modern climate and vegetation represented by leaf area index （LAI） and net primary production （NPP）. The results show that the simulated LAI variation, corresponding to the observed LAI variation, agrees with the peak-valley variation of precipitation in these belts. The annual mean NPP simulated by the coupled model is also consistent with PIK NPP data in its overall variation trend along the four belts, which is a good example to promote global ecological studies by coupling the climate and vegetation models. A large discrepancy between the simulated and estimated LAI emerges to the south of 15°N along PEP 3 and to the south of 18°S in PEP 1S, and the discrepancy for the simulated NPP and PIK data in the two regions is relatively smaller in contrast to the LAI difference. Precipitation is a key factor affecting vegetation variation, and the overall trend of LAI and NPP corresponds more obviously to precipitation variation than temperature change along most parts of these PEP belts.

关键词： Pole-Equator-Pole belts leaf area index (LAI) net primary production (NPP) AVIM-GOALS precipitation air temperature

The Statistical Significance Test of regional climate Change Caused by Land Use and Land Cover Variation in West China

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Advances in Atmospheric Sciences 2006年第3期23卷 355-364页

作者：王汉杰施伟来陈晓红 key laboratory of regional climate-environment research for temperate east asia Institute of Meteorology Anhui Meteorological Observatory

The West Development Policy being implemented in China is causing significant land use and land cover （LULC） changes in West China. With the up-to-date satellite database of the Global Land Cover Characteristics Database （GLCCD） that characterizes the lower boundary conditions, the regional climate model RIEMS-TEA is used to simulate possible impacts of the significant LULC variation. The model was run for five continuous three-month periods from 1 June to 1 September of 1993, 1994, 1995, 1996, and 1997, and the results of the five groups are examined by means of a student t-test to identify the statistical significance of regional climate variation. The main results are：（1） The regional climate is affected by the LULC variation because the equilibrium of water and heat transfer in the air-vegetation interface is changed. （2） The integrated impact of the LULC variation on regional climate is not only limited to West China where the LULC varies, but also to some areas in the model domain where the LULC does not vary at all. （3） The east asian monsoon system and its vertical structure are adjusted by the large scale LULC variation in western China, where the consequences are the enhancement of the westward water vapor transfer from the east oast and the relevant increase of wet-hydrostatic energy in the middle-upper atmospheric layers. （4） The ecological engineering in West China affects significantly the regional climate in Northwest China, North China and the middle-lower reaches of the Yangtze River; there are obvious effects in South, Northeast, and Southwest China, but minor effects in Tibet.

关键词： West Development Policy of China LULC variation regional climate simulation statistical t-test east asian monsoon

Trends in the Different Grades of Precipitation over South China during 1960–2010 and the Possible Link with Anthropogenic Aerosols

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Advances in Atmospheric Sciences 2014年第2期31卷 480-491页

作者： FU Chuanbo DAN Li key laboratory of regional climate-environment research for temperate east asia Institute of Atmospheric Physics Chinese Academy of Sciences Hainan Meteorological Observatory key laboratory of regional climate–environment research for temperate east asia Institute of Atmospheric Physics Chinese Academy of Sciences

Using observed daily precipitation data to classify five levels of rainy days by strength in South China （SC）,with an emphasis on the Pearl River Delta （PRD） region,the spatiotemporal variation of different grades of precipitation during the period 1960-2010 was analyzed and the possible link with anthropogenic aerosols *** analysis showed that drizzle and small precipitation has significantly decreased,whereas medium to heavy precipitation has increased slightly over the past 50 years （although not statistically significant）.Further data analysis suggested that the decline in drizzle and small precipitation probably has a strong link to increased concentrations of anthropogenic aerosols produced by large-scale human activities related to the rapid socioeconomic development of the PRD *** aerosols may also have led to the obvious decreasing trend in horizontal visibility and sunshine duration in SC,which is statistically significant according to the t-test.

关键词： precipitation grades rainy days horizontal visibility sunshine duration anthropogenic aerosols

Using Quantile Regression to Detect Relationships between Large-scale Predictors and Local Precipitation over Northern China

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Advances in Atmospheric Sciences 2015年第4期32卷 541-552页

作者： FAN Lijun XIONG Zhe key laboratory of regional climate-environment research for temperate east asia Institute of Atmospheric PhysicsChinese Academy of Sciences

Quantile regression（QR） is proposed to examine the relationships between large-scale atmospheric variables and all parts of the distribution of daily precipitation amount at Beijing Station from 1960 to 2008. QR is also applied to evaluate the relationship between large-scale predictors and extreme precipitation（90th quantile） at 238 stations in northern ***, QR is used to fit observed daily precipitation amounts for wet days at four sample stations. Results show that meridional wind and specific humidity at both 850 h Pa and 500 h Pa（V850, SH850, V500, and SH500） strongly affect all parts of the Beijing precipitation distribution during the wet season（April–September）. Meridional wind, zonal wind, and specific humidity at only 850 h Pa（V850, U850, SH850） are significantly related to the precipitation distribution in the dry season（October–March）. Impacts of these large-scale predictors on the daily precipitation amount with higher quantile become stronger, whereas their impact on light precipitation is negligible. In addition, SH850 has a strong relationship with wet-season extreme precipitation across the entire region, whereas the impacts of V850, V500, and SH500 are mainly in semi-arid and semi-humid areas. For the dry season, both SH850 and V850 are the major predictors of extreme precipitation in the entire region. Moreover, QR can satisfactorily simulate the daily precipitation amount at each station and for each season, if an optimum distribution family is selected. Therefore, QR is valuable for detecting the relationship between the large-scale predictors and the daily precipitation amount.

关键词： quantile regression large-scale predictors precipitation distribution predictor–precipitation relationship northern China

The Soil Moisture of China in a High Resolution climate-Vegetation Model

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Advances in Atmospheric Sciences 2005年第5期22卷 720-729页

作者：丹利季劲钧张培群 laboratory for climate Study National Climate Center START regional Center for temperate east asia and key laboratory of regional climate-environment for temperate east asia Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029

The spatial distribution of soil moisture, especially the temporal variation at seasonal and interannual scales, is difficult for many land surface models （LSMs） to capture partly due to the deficiencies of the LSMs and the highly spatial variability of soil moisture, which makes it problematic to simulate the moisture for climate studies. However the soil moisture plays an important role in influencing the energy and hydrological cycles between the land and air, so it should be considered in land surface models. In this paper, a soil moisture simulation in China with a T213 resolution （about 0.5625°× 0.5625°） is compared to the observational data, and its relationship to precipitation is explored. The soil moisture distribution agrees roughly with the observations, and the soil moisture pattern reflects the variation and intensity of the precipitation. In particular, for the 1998 summer catastrophic floods along the Yangtze River, the soil moisture remains high in this region from July to August and represents the flood well. The seasonal cycle of soil moisture is roughly consistent with the observed data, which is a good calibration for the ground simulation capacity of the Atmosphere-Vegetation Interaction Model （AVIM） with respect to this tough problem for land surface models.

关键词： soil moisture precipitation AVIM NCEP 2 seasonal cycle

Comparison of Products from ERA-40,NCEP-2,and CRU with Station Data for Summer Precipitation over China

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Advances in Atmospheric Sciences 2006年第4期23卷 593-604页

作者：赵天保符淙斌 Global Change System for Analysis research and Training Regional Center for Temperate East Asia Key Laboratory of Regional Climate-Environment Research for Temperate East AsiaInstitute of Atmospheric PhysicsChinese Academy of Sciences

Summer precipitation products from the 45-Year European Centre for Medium-Range Weather Forecast （ECMWF） Reanalysis （ERA-40）, and NCEP-Department of Energy （DOE） Atmospheric Model Intercomparison Project （AMIP-II） Reanaiysis （NCEP-2）, and Climatic research Unit （CRU） TS 2.1 dataset are compared with the corresponding observations over China in order to understand the quality and utility of the reanalysis datasets for the period 1979-2001. The results reveal that although the magnitude and location of the rainfall belts differ among the reanaiysis, CRU, and station data over South and West China, the spatial distributions show good agreement over most areas of China. In comparison with the observations in most areas of China, CRU best matches the observed summer precipitation, while ERA-40 reports less precipitation and NCEP-2 reports more precipitation than the observations. With regard to the amplitude of the interannuai variations, CRU is better than either of the reanalyses in representing the corresponding observations. The amplitude in NCEP-2 is stronger but that of ERA-40 is weaker than the observations in most study domains. NCEP-2 has a more obvious interannuai variability than ERA-40 or CRU in most areas of east China. Through an Empirical orthogonai function （EOF） analysis, the main features of the rainfall belts produced by CRU agree better with the observations than with those produced by the reanalyses in the Yangtze-Huaihe River valley. In east of China, particularly in the Yangtze-Huaihe River valley, CRU can reveal the quasi-bienniai oscillation of summer precipitation represented by the observations, but the signal of ERA-40 is comparatively weak and not very obvious, whereas that of NCEP-2 is also weak before 1990 but very strong after 1990. The results also suggest that the magnitude of the precipitation difference between ERA-40 and the observations is smaller than that between NCEP-2 and the observations, but the variations represented by NCEP-2

关键词： summer precipitation reanalysis, observations, comparison

Continuous Measurement of Number Concentrations and Elemental Composition of Aerosol Particles for a Dust Storm Event in Beijing

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Advances in Atmospheric Sciences 2008年第1期25卷 89-95页

作者：张仁健韩志伟沈振兴曹军骥 key laboratory of regional climate-environment research for temperate east asia Institute of Atmospheric Physics Chinese Academy of Sciences START Regional Center for Temperate East Asia key laboratory of regional climate-environment research for temperate east asia Institute of Atmospheric Physics Chinese Academy of Sciences Department of environmental Science and Engineering Xi'an Jiaotong University Institute of Earth environment Chinese Academy of Sciences

A continuous measurement of number size distributions and chemical composition of aerosol particles was conducted in Beijing in a dust storm event during 21-26 March 2001. The number concentration of coarse particles （〉2μm） increased more significantly than fine particles （〈2μm） during the dust storm due to dust weather, while the anthropogenic aerosols collected during the non-dust-storm period tended to be associated with fine particles. Elemental compositions were analyzed by using proton-induced X-ray emission （PIXE）. The results show that 20 elements in the dust storm were much higher than in the non-dust-storm period. The calculated soil dust concentration during the dust storm was, on average, 251.8μg m^-3, while it was only 52.1μg m^-3 on non-dust-storm days. The enrichment factors for Mg, A1, P, K, Ca, Ti, Mn, Fe, C1, Cu, Pb, and Zn show small variations between the dust storm and the non-dust-storm period, while those for Ca, Ni and Cr in the dust storm were much lower than those in the non-dust-storm period due to significant local emission sources. A high concentration and enrichment factor for S were observed during the dust storm, which implies that the dust particles were contaminated by aerosol particles from anthropogenic emissions during the long-range transport. A statistical analysis shows that the elemental composition of particles collected during the dust storm in Beijing were better correlated with those of desert soil colleted from desert regions in Inner Mongolia. Air mass back-trajectory analysis further confirmed that this dust storm event could be identified as streaks of dust plumes originating from Inner Mongolia.

关键词： PIXE elemental concentration number concentration dust storm