Analysis of the vegetation trends using low resolution remote sensing data in Burkina Faso (1982–1999) for the monitoring of desertification
Analysis of the vegetation trends using low resolution remote sensing data in Burkina Faso (1982–1999) for the monitoring of desertification
复制标题
利用低分辨率遥感数据分析布基纳法索（1982-1999）植被趋势，以监测荒漠化
DOI：
--
复制
发表时间：
2006
期刊：
影响因子：
--
通讯作者：
P. Ozer
中科院分区：
文献类型：
--
作者：
Y. Hountondji;N. Sokpon;P. Ozer
自20世纪60年代末开始，西非萨赫勒地区经历了大约20年的严重降雨不足，自20世纪90年代初以来，降水量一直在增加。《联合国防治荒漠化公约》（《荒漠化公约》）的执行需要查明长期以来植被生产力下降的地区。在这个范围内，我们分析了植被生产力的状态，使用长期时间序列的NOAA AVHRR NDVI数据，并将其与降雨量数据进行比较。为此，128雨量计数据（RR）进行了比较，在布基纳法索的综合归一化植被指数在生长期（iNDVI）值从1982年至1999年。在分析期间，大多数在该国的研究站是稳定的iNDVI/RR（57.8%）。然而，39.8%的土地iNDVI/RR表现出弱到强的负趋势，只有2.4%的土地iNDVI/RR表现出弱的正趋势。这些消极趋势可能反映了布基纳法索正在进行的荒漠化进程，可以作为确定热点地区的起点，以确定在何处采取防治荒漠化行动。
After about two decades of dramatic rainfall deficits that started in the late 1960s, the Sahel of West Africa has experienced increasing precipitation since the early 1990s. The implementation of the United Nations Convention to Combat Desertification (UNCCD) needs the identification of areas that record declining vegetation productivity over long‐time periods. In this scope, we analyse the state of the vegetation productivity using long‐term time series of NOAA AVHRR NDVI data and compare it to rainfall data. For this, 128 rain gauge data (RR) were compared with the integrated NDVI during the growing period (iNDVI) values in Burkina Faso from 1982 to 1999. During the analysed period, most of the studied stations in the country were stable for the iNDVI/RR (57.8%). However, 39.8% showed a weak to strong negative trend in the iNDVI/RR while only 2.4% showed a weak positive trend. These negative trends may reflect ongoing desertification processes in Burkina Faso and could be a starting point for the identification of hot‐spots areas to determine where to take action to combat desertification.