1. It is a historic commitment for CAS staff tomake fundamental, strategic and forward-lookingcontributions to the development of west China. The large-scale development strategy for westChina is an essential componen...1. It is a historic commitment for CAS staff tomake fundamental, strategic and forward-lookingcontributions to the development of west China. The large-scale development strategy for westChina is an essential component of Comrade DengXiaoping’s strategic thinking on China’s moderni-zation drive. which encompasses the developmentof both the coastal areas and the interior. Accordingto his thinking, the coastal areas in east China wouldtake the initiative in development through展开更多
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 Dat...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.展开更多
The Great Western China Development Drive launched by China’s Central Authorities at the turn of the century is not only a strategic move to narrow the development gap between the eastern and western parts of the cou...The Great Western China Development Drive launched by China’s Central Authorities at the turn of the century is not only a strategic move to narrow the development gap between the eastern and western parts of the country an harmonious development of the national economy but also a major move for narrowing the development gap among different ethnic groups and further improving human rights of the people, especially minorities.展开更多
The West Development Policy being implemented in China causes significant land use and land cover (LULC) changes in West China, of which the two most important types of LULC change are replacing farmland and re-greeni...The West Development Policy being implemented in China causes significant land use and land cover (LULC) changes in West China, of which the two most important types of LULC change are replacing farmland and re-greening the desertification land with forest or grass. This paper modifies the prevailing regional climate model (RCM) by updating its lower boundary conditions with the up-to-date satellite database of the Global Land Cover Characteristics Database (GLCCD) created by the United States Geological Survey and the University of Nebraska-Lincoln. The modified RCM is used to simulate the possible regional climate changes due to the LULC variations. The preliminary results can be summarized as that the two main types of LULC variation, replacing farmland and greening the desertification lands with forest or grass in west China, will affect the regional climate mostly in northwest and north China, where the surface temperature will decrease and the precipitation will increase. The regional climate adjustments in South, Southwest China and on the Tibet Plateau are uncertain.展开更多
文摘1. It is a historic commitment for CAS staff tomake fundamental, strategic and forward-lookingcontributions to the development of west China. The large-scale development strategy for westChina is an essential component of Comrade DengXiaoping’s strategic thinking on China’s moderni-zation drive. which encompasses the developmentof both the coastal areas and the interior. Accordingto his thinking, the coastal areas in east China wouldtake the initiative in development through
文摘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.
文摘The Great Western China Development Drive launched by China’s Central Authorities at the turn of the century is not only a strategic move to narrow the development gap between the eastern and western parts of the country an harmonious development of the national economy but also a major move for narrowing the development gap among different ethnic groups and further improving human rights of the people, especially minorities.
基金This study was supported bythe National Key Basic Research Development Programgranted by the Ministry of Science and Technology ofChina (MSTC) with project number G1999043500. Itwas also partly supported by the Innovation Program ofthe Chinese
文摘The West Development Policy being implemented in China causes significant land use and land cover (LULC) changes in West China, of which the two most important types of LULC change are replacing farmland and re-greening the desertification land with forest or grass. This paper modifies the prevailing regional climate model (RCM) by updating its lower boundary conditions with the up-to-date satellite database of the Global Land Cover Characteristics Database (GLCCD) created by the United States Geological Survey and the University of Nebraska-Lincoln. The modified RCM is used to simulate the possible regional climate changes due to the LULC variations. The preliminary results can be summarized as that the two main types of LULC variation, replacing farmland and greening the desertification lands with forest or grass in west China, will affect the regional climate mostly in northwest and north China, where the surface temperature will decrease and the precipitation will increase. The regional climate adjustments in South, Southwest China and on the Tibet Plateau are uncertain.
