黄土高原气候环境演变研究  

A Review of Recent Study Advances in Climatic Environment on China Loess Plateau

作　　者：王毅荣[1,2] 张强[1] 江少波 

机构地区：[1]中国气象局兰州干旱气象研究所/甘肃省干旱气候变化减灾重点实验室/中国气象局干旱气候变化与减灾重点开放实验室,兰州730020 [2]甘肃省定西市气象局,定西743000

出　　处：《气象科技进展》2011年第2期38-42,共5页Advances in Meteorological Science and Technology

基　　金：国家自然科学基金:半干旱区凝结水形成规律及其对地气水热交换的影响(41075009)

摘　　要：该领域相关研究主要基于生物地质记录、历史文献和器测资料,研究了黄土高原气候在万年、千年和百年尺度上的演变特征,探讨了当时自然植被状况与气候变化的联系;分析了当代黄土高原气候变化及其区域响应的主要特点。从较为宏观的角度,为研究黄土高原环境效应提供相关的历史背景。The Loess Plateau is a plateau that covers an area of about 640,000 km2 in the upper and middle reaches of China's Yellow River. The Loess Plateau was formed over long geologic times, and some works of writing have provided valuable information about climate environment change from samples taken from the deep layer ofits silty soil, data observed by satellite instrumentation, and historical documents. The Loess Plateau was highly fertile and easy to farm in ancient times, which contributed to the development of early Chinese civilization around the Loess Plateau. In medieval times of China, people stayed here to grow rice. Centuries of deforestation and over-grazing, exacerbated by China’s population increase, have resulted in degenerated ecosystems, desertification, and poor local economies; in fact, the soil of this region has been called the most highly erodible soil at 22 Ma BP, and the fine-grained silt was picked up by strong prevailing westerly winds. Huge dust clouds moved and redeposited over loess plateau areas. Due to the nature of loess soil and its ability to slope in vertical columns when flooding occurs, the stabilized soil-layers were eroded into the corrugated, sharply-dissected bluffs we see today. During the last Ice Age, sometime the north monsoon retreated and south-east monsoon more devoloped and vast amounts of watervapor and heat-resource flowed into the plateau region. The sediment was deposited on the floodplain, creating huge soil flats. When meltwaters receded, these mud flats were exposed. The Loess plateau has a rich archaeological heritage. The region in response to global climate change on China's loess plateau, showed that the climate became warmer and drier in autumn over the plateau; Winter rainfall was trending up; the west part of the plateau became wet; the east part became arid in summer. The seasonal and regional characteristics were very clear.The sensitivity regions of rainfall were different, moving westward and southward from spring to winter. Some of rain items, such

关 键 词：黄土高原 气候环境 演变 进展 

分 类 号：P467[天文地球—大气科学及气象学]