|
 |
SCI论文目录 |
近40a我国北方农牧交错区气候变化及其与土地沙漠化的关系――以科尔沁沙地为例 |
| ------------------------------------------------------------------------------------------ |
| 出 版 社：中国沙漠 |
| 发表时间：2000年s1期 |
| 台 站：
奈曼沙漠化研究站
|
| 作 者：赵哈林 |
| 点 击 率：6788 |
| ------------------------------------------------------------------------------------------ |
| 关 键 字：科尔沁沙地;;农牧交错区;;气候变化;;沙漠化 |
| 摘 要：近 40 a来 ,伴随着全球气候变化 ,科尔沁沙地的气候也发生了较为明显的变化。主要表现为 :90年代和 6 0年代相比 ,年均气温升高 0 \^5～ 1.2℃ ,气温波动性减小 43.0 %～ 6 1.0 % ;年均降水量增加 5 0～ 6 7mm,年降水变异系数增大 2 0 %～ 5 0 % ;年均蒸发量下降 16 .7% ;气候呈现暖湿化趋势。其中升温主要发生于冬季 ,降水增加主要发生于春夏两季。近 40 a来 ,该区沙漠化呈明显发展趋势 ,其中从 5 0年代末到 80年代末 ,沙漠化面积由 32 92 5km2 增加到 71884km2 ,年均发展速度高达 3.94% ,虽然到 90年代其年均发展速度降到 1.2 % ,但总面积却扩展了86 |
| 关 键 字(英文)：Horqin Sand Land interlaced agro-pastral areas climatic changes |
| 摘 要(英文)：In past 40 years accompanied by the global climatic changes, the climate of Horqin Sand Land has changed significantly too. Comparing 90’s climatic data with 60’s, it can be found the mean annual temperature increasing 0.5-1.2℃, which mainly happened in winter; the changed amplitude of air temperature decreasing 43-61%; the mean annual precipitation increasing 50-67mm, which mainly concentrated in spring and summer; and the mean annual evaporation decreasing 16.7%. All of those indicates the trend the climate of this area has been becoming warmer and wetter than before. The increasing of precipitation is benefit to natural vegetation restoring and agriculture development, meanwhile, it is also easy to lead to reclamation of grassland to agricultural land use at large scale. With prohibition the reclamation, we should develop irrigation agriculture and strengthen the protection and construction of natural vegetation. |
| ------------------------------------------------------------------------------------------ |
| null |
|
|
|
