GUO Lian-yun,XIONG Lian-she,WANG Wan-man.Influence of Climatic Change on Talatan Lawn Desertification in Recent 50 Years[J].Research of Soil and Water Conservation,2008,15(06):57-63.
近50年气候变化对塔拉滩草地荒漠化的影响
- Title:
- Influence of Climatic Change on Talatan Lawn Desertification in Recent 50 Years
- Keywords:
- climatic change; lawn; desertification; degeneration
- 分类号:
- X171.1;P467
- 摘要:
- 塔拉滩区地处共和盆地，20世纪80年代以后，该地区草地严重退化，沙漠化强烈发展等生态恶化问题十分突出。通过共和盆地近50a的气温、降水、大风、沙尘暴和草地蒸发力等气候因子的变化特征，分析了草地退化的主要原因，结果显示46a来仅气温呈现出明显的上升趋势，降水呈现微弱的增加趋势，蒸发量和草地蒸发力随时间呈现上升趋势。通过1987年、1996年两期TM卫星遥感影像解译和1994年、1999年两期沙漠化普查与监测，进一步表明共和盆地塔拉滩草地荒漠化正在扩展。塔拉滩草地荒漠化扩展是气候变化和人类活动共同胁迫的结果，不合理的人类活动对荒漠化发生与扩展起着加速、加剧作用。
- Abstract:
- Talatan area is located Gonghe basin.After 1980s,ecology worsening questions such as the local lawn serious degeneration,desertification intense development are extremely prominent.The primary degeneration causes are analyzed based on the change characteristics of temperature,precipitation,gale,sand storm and lawn evaporative power in Gonghe basin in resent 50 years.Results indicated that temperature presents the obvious trend of escalation,the precipitation presents the weak increase tendency,the evaporation rate and the lawn evaporative power presents the trend of escalation during 46 years.Through two issue of TM satellite remote sensing phantom interpretation in 1987,1996 and two issue of desertification general surveys and monitor in 1994,1999,it further indicated the Gonghe basin Talatan lawn desertification is expanding.The conclusion proved that the Talatan lawn desertification expansion is a result which the climatic change and the humanity force together,the unreasonable humanity activities to the desertification occurs with expanding the acceleration,the aggravating function.
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备注/Memo
收稿日期:2008-1-28;
基金项目:国家“十一五”科技支撑计划项目（2006BAD26B10）
作者简介:郭连云（1969- ），男，青海湟源人，工程师，从事气象业务管理工作。E-mail：glycloud@126.com