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

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

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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1期18卷 32-38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 PhysicsChinese Academy of SciencesBeijingChina Key Laboratory of Atmospheric Environment and Processes in the Boundary Layer over the Low-Latitude Plateau Region Department of Atmospheric ScienceYunnan UniversityKunmingChina

El Niño-Southern Oscillation(ENSO)is a major driver of climate change in middle and low latitudes and thus strongly influences the terrestrial carbon cycle through land-air *** the ENSO modulation and carbon flux variability are projected to increase in the future,but their connection still needs further *** investigate the impact of future ENSO modulation on carbon flux variability,this study used 10 CMIP6 earth system models to analyze ENSO modulation and carbon flux variability in middle and low latitudes,and their relationship,under different scenarios simulated by CMIP6 *** results show a high consistency in the simulations,with both ENSO modulation and carbon flux variability showing an increasing trend in the *** higher the emissions scenario,especially SSP5-8.5 compared to SSP2-4.5,the greater the increase in *** flux variability in the middle and low latitudes under SSP2-4.5 increases by 30.9%compared to historical levels during 1951-2000,while under SSP5-8.5 it increases by 58.2%.Further analysis suggests that ENSO influences mid-and low-latitude carbon flux variability primarily through *** occurrence may potentially be attributed to the increased responsiveness of gross primary productivity towards regional temperature fluctuations,combined with the intensified influence of ENSO on land surface temperatures.

关键词： Carbon variability ENSO modulation CMIP6 models

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Interannual variability of boreal summer intraseasonal oscillation over the northwestern Pacific influenced by the Pacific Meridional Mode

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Atmospheric and Oceanic Science Letters 2025年第1期18卷 6-11页

作者： Haoyu Zhou Pang-Chi Hsu Lin Chen Yitian Qian Key Laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory of Climate and Environmental Change/Collaborative Innovation Center on Forecast and Evaluation of Meteorological DisastersNanjing University of Information Science and TechnologyNanjingChina

During the boreal summer,intraseasonal oscillations exhibit significant interannual variations in intensity over two key regions:the central-western equatorial Pacific(5°S-5°N,150°E-150°W)and the subtropical Northwestern Pacific(10°-20°N,130°E-175°W).The former is well-documented and considered to be influenced by the ENSO,while the latter has received comparatively less attention and is likely influenced by the Pacific Meridional Mode(PMM),as suggested by partial correlation analysis *** elucidate the physical processes responsible for the enhanced(weakened)intraseasonal convection over the subtropical northwestern Pacific during warm(cold)PMM years,the authors employed a moisture budget *** findings reveal that during warm PMM years,there is an increase in summer-mean moisture over the subtropical northwestern *** increase interacts with intensified vertical motion perturbations in the region,leading to greater vertical moisture advection in the lower troposphere and consequently resulting in convective *** a process is pivotal in amplifying intraseasonal convection *** observational findings were further verified by model experiments forced by PMM-like sea surface temperature patterns.

关键词： Boreal summer intraseasonal oscillation Interannual variability Pacific Meridional Mode Moisture budget analysis

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An Experiment of a Statistical Downscaling Forecast Model for Summer Precipitation over China

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Atmospheric and Oceanic Science Letters 2011年第5期4卷 270-275页

作者： KE Zong-Jian ZHANG Pei-Qun CHEN Li-Juan DU Liang-Min National climate center Beijing 100081 China wuhan regional climate center Wuhan 430074 China

A combination of the optimal subset regression (OSR) approach,the coupled general circulation model of the National climate center (NCC-CGCM) and precipitation observations from 160 stations over China is used to construct a statistical downscaling forecast model for precipitation in *** forecasts are performed to assess the skill of statistical downscaling during the period from 2003 to *** results show a poor simulation for summer precipitation by the NCCCGCM for China,and the average spatial anomaly correlation coefficient (ACC) is 0.01 in the forecast *** forecast skill can be improved by OSR statistical downscaling,and the OSR forecast performs better than the NCC-CGCM in most years except *** spatial ACC is more than 0.2 in the years 2008 and 2009,which proves to be relatively ***,the statistical downscaling forecast performs relatively well for the main rain belt of the summer precipitation in some years,including 2005,2006,2008,and ***,the forecast skill of statistical downscaling is restricted to some extent by the relatively low skill of the NCCCGCM.

关键词： precipitation statistical downscaling China summer

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Analysis of Tibetan Plateau Vortex Activities Using ERA-Interim Data for the Period 1979-2013

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Journal of Meteorological Research 2015年第5期29卷 720-734页

作者：林志强 Tibetan Autonomous regional climate center

Based on the ECMWF Interim reanalysis （ERA-Interim） 500-hPa height data for the period 1979-2013, the Tibetan Plateau vortex （TPV） activities are investigated with an objective identification and tracking algorithm. The vortex tracks over the Tibetan Plateau （TP） and its vicinity are identified, and the cold/warm nature of the TPV is revealed from the 500-hPa temperature fields. A TPV activity dataset is thus derived. Examination of the TPV frequency, intensity, persistence, geographical location, and migration from the TP suggests an average of 53 TPVs annually during the study period, with 6.7 of them shifting out of the TP. For these vortexes, the longer the lifetime, the lower the frequency, and 81% of the TPVs are initially warm in nature. The particularly high-intensity vortexes occur dominantly in the rainy period （May September）, with their origin mainly in western Nagqu and northern Ali. They disappear largely in the Tanggula maintain area on the east side of the vortex high-frequency center and the Dangqu River valley in western Qinghai Province, possibly due to the topography. It is also found that the frequency of TPVs is decreasing, with 2 fewer TPV occurrences per 10 yr. Meanwhile, it is statistically significant that 1.4 fewer TPVs move out of the TP and the percentage of TPVs moving out of the TP versus the total number of TPVs has reduced by 2.3% every 10 yr.

关键词： plateau vortex objective identification ERA-Interim climate characteristics

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Relationship between Tropical Indian Ocean SSTA in Spring and Precipitation of Northeast China in Late Summer

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Journal of Meteorological Research 2019年第6期33卷 1060-1074页

作者： Junhu ZHAO Jie ZHOU Kaiguo XIONG Guolin FENG Laboratory for climate Studies National Climate CenterChina Meteorological AdministrationBeijing 100081 College of Physical Science and Technology Yangzhou UniversityYangzhou 225002 Chongqing climate center Chongqing Meteorological ServiceChongqing 401147 wuhan regional climate center Wuhan 430074

Sea surface temperature anomaly(SSTA)is a major signal for prediction of summer precipitation in East *** relationship between SSTA in the tropical oceans and summer precipitation in East Asia has been documented in many ***,the relationship between SSTA and late summer(July–August)precipitation(JAP)over Northeast China(NEC)on the interannual timescale has received little *** this study,we examine the relationship between Indian Ocean Basin warming(IOBW)anomalies in spring and the JAP in NEC since the early1960 s.A significant positive correlation is found between the spring IOBW index and JAP over *** positive spring IOBW anomaly is followed by an anomalous anticyclone from Northwest Pacific to the Korean *** anomalous anticyclone favors a significantly strong and northward western Pacific subtropical high(WPSH),which facilitates anomalous southerly winds over NEC and the transport of more water vapor into this *** analysis indicates that the spring IOBW anomalies have important impacts on the vertical air motion in the tropics and subtropics during the *** anomalous upward(downward)motion covering Indonesia(Northwest Pacific to the southern Korean Peninsula)occurs when the IOBW is in its positive phase,which favors the northward movement of the WPSH in late summer and more precipitation over NEC in July–*** of the atmospheric circulation by this mechanism further influences the JAP over NEC.

关键词： Northeast China(NEC) late summer precipitation interannual circulation Indian Ocean Basin warming(IOBW)

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URBAN HEAT ISLAND EFFECT AND ITS CONTRIBUTION TO OBSERVED TEMPERATURE INCREASE AT wuhan STATION, CENTRAL CHINA

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Journal of Tropical Meteorology 2019年第1期25卷 102-113页

作者： JIA Wen-qian REN Guo-yu SUONAN Kan-zhuo ZHANG Pan-feng WEN Kang-min REN Yong-jian Department of Atmospheric Sciences China University of Geosciences Laboratory for climate Studies China Meteorological Administration National Climate Center wuhan regional climate center

Based on an in-homogeneity adjusted dataset of the monthly mean temperature, minimum and maximum temperature, this paper analyzes the temporal characteristics of Urban Heat Island(UHI) intensity at wuhan Station, and its impact on the long-term trend of surface air temperature change recorded during 1961-2015 by using an urban-rural method. Results show that UHI effect is obvious near wuhan Station in the past 55 years, especially for minimum temperature. The strongest UHI intensity occurs in summer and the weakest in winter. For the period 1961-2004, UHI intensity undergoes a significant increase near the urban station, with the increase especially large for the period 1988-2004, but the last 10 years witness a significant decrease, with the decrease in minimum temperature being more significant than that of maximum temperature. The annual mean urban warming and its contribution to overall warming are 0.18 C/10 yr and 48.8% respectively for the period 1961-2015, with a more significant and larger urbanization effect seen in Tminthan Tmax. Thus, a large proportion warming, about half of the overall increase in annual mean temperature,as observed at the urban station, can be attributed to the rapid urbanization in the past half a century.

关键词： data in-homogeneity UHII urban warming climate change

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Objective identification research on cold vortex and mid-summer rainy periods in Northeast China

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Chinese Physics B 2015年第4期24卷 571-580页

作者：龚志强封泰晨房一禾 Laboratory for climate Studies and climate Monitoring and Diagnose National Climate Center China Meteorological Administration Atmosphere and Science College Lanzhou University regional climate center of Shenyang

Considering the differences between the Northeast China Cold Vortex （CV） and the Mid-Summer （MS） rainy period and their corresponding atmospheric circulations are comprehensively analyzed, and the objective identification methods of defining the annual beginning and ending dates of Northeast China CV and MS rainy periods are developed respectively. The annual beginning date of the CV （MS） rainy period is as follows. In a period from April to August, if daily regional mean precipitation ryi is larger than yearly regional mean precipitation R （or 2R） on a certain day, the station precipitation rs is larger than the station yearly mean precipitation （r/ （or 2（r）） in at least 50% of stations in Northeast China, and this condition is satisfied in the following 2 （7） days, then this date is defined as the beginning date of the CV （MS） rainy period. While the definition of the ending date of the MS rainy period shows the opposite process to its beginning date. With this objective identification method, the multi-year average （1981-2010） beginning date of the CV rainy period is May 3, the beginning date of the MS rainy period is June 27, the ending day of the CV rainy period is defined as the day before the beginning date of the MS rainy period, and the ending date of the MS rainy period is August 29. Meanwhile, corresponding anomaly analysis at a 500-hPa geopotential height, 850-hPa wind, Omega and relative humidity fields all show that the definitions of the average beginning and ending dates of the CV and MS rainy periods have a certain circulation meaning. Furthermore, the daily evolution of the CV index, meridional and zonal wind index, etc. all show that these objectively defined beginning and ending dates of the CV and MS rainy periods have climate significance.

关键词： Northeast China cold vortex rainy period mid-summer rain period objective identification method

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climate Change Impacts and Adaptation Strategies in Northwest China

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Advances in climate Change Research 2014年第1期5卷 7-16页

作者： ZHAO Hong-Yan GUO Jun-Qin ZHANG Cun-Jie SUN Lan-Dong ZHANG Xu-Dong LIN Jing-Jing WANG You-Heng FANG Feng MA Peng-Li LIU Cai-Hong LI Yan-Chun FANG Jian-Gang LI Lin LI Hong-Mei ZHENG Guang-Fen DENG Zhen-Yong DONG An-Xiang Northwest regional climate center Qinghai climate center Ningxia climate center Shaanxi climate center

climate change resulted in changes in crop growth duration and planting structure, northward movement of planting region, and more severe plant diseases and insect pests in Northwest China. It caused earlier seeding for spring crop, later seeding for autumn crop, accelerated crop growth, and reduced mortality for winter crop. To adapt to climate change, measures such as optimization of agricultural arrangement, adjustment of planting structure, expansion of thermophilic crops, and development of water-saving grassland and livestock were enhanced. agriculture have been taken. Damaging The deterioration trend of grassland was consequences of imbalance between intensified; both grass quantity and quality declined. With overgrazing, proportions of inferior grass, weeds and poisonous weeds increased in plateau pastoral areas. Returning farmland to grazing, returning grazing to grassland, fence enclosure and artificial grassland construction have been implemented to restore the grassland vegetation, to increase the grassland coverage, to reasonably control the livestock carrying capacity, to prevent overgrazing, to keep balance between grassland and livestock, and to develop the ecological animal husbandry. In Northwest China, because the amount of regional water resources had an overall decreasing trend, there was a continuous expansion in the regional land desertification, and soil erosion was very serious. A series of measures, such as development of artificial precipitation （snow）, water resources control, regional water diversion, water storage project and so on, were used effectively to respond to water deficit. It had played a certain role in controlling soil erosion by natural forest protection and returning farmland to forest and grassland. In the early 21st century, noticeable achievements had been made in prevention and control of desertification in Northwest China. The regional ecological environment has been improved obviously, and the desertification trend h

关键词： Northwest China climate change impact and adaptation

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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

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