Analysis of Lake Chany using NOAA images
Analysis of Lake Chany using NOAA images
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使用 NOAA 图像分析 Chany 湖
DOI：
10.1109/igarss.2003.1295312
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
E. Kikuchi
中科院分区：
文献类型：
--
作者：
K. Kawano;J. Kudoh;S. Shikano;E. Kikuchi
NOAA AVHRR 图像的时间分析对于观测地球环境非常有效。尤其是西伯利亚对地球环境影响较大。恰尼湖综合体位于新西伯利亚地区鄂毕河和额尔蒂什河之间。钱尼湖没有流出河流，这对于调查环境变化是有效的。我们在钱尼湖进行研究的目的是使用 NOAA AVHRR 图像测量开放水域的季节变化，并将 NOAA AVHRR 图像与地面实况数据进行比较。我们开发了一种分析系统，用于对 NOAA AVHRR 图像中任意区域的像素进行计数。人们认为入口和航道附近的面积被低估了。由于 NOAA 的分辨率为每像素 1.1 公里，因此很难精确测量小入口或海湾。昌尼湖面积在春季最大，到夏季逐渐减少。然后到了秋天就固定下来了。我们通过比较 NOAA AVHRR 图像与地面实况数据（包括湖泊学特征的测量）来详细分析结果。该地区水边芦苇丛生，长达数公里，形成芦苇群落。冬天，这里的植被被白雪覆盖，春天到来时，芦苇仍然掉落。因此，芦苇群落在 NOAA AVHRR 图像上可能被识别为开放水域。
The temporal analysis of NOAA AVHRR images is effective for observing the Earth's environment. Especially Siberia has the large influence on the Earth's environment. The Lake Chany complex is located in the Novosibirsk region between the Ob' River and the Irtish River. It is effective in investigating an environmental change that there is no river of outflow from the Lake Chany. Our aims of the study in Lake Chany are to measure the seasonal changes in the open water area by using NOAA AVHRR images and to compare NOAA AVHRR images with the data from the ground truth. We developed an analysis system to count pixels for arbitrary area in NOAA AVHRR images. The area is thought to be an underestimate in the neighborhood of the inlet and the channel. It is difficult to measure small inlets or bays exactly because the resolution of NOAA is 1.1 km per pixel. The area of Lake Chany was the largest in spring and decreased until summer. It then became fixed in autumn. We analyzed the results in detail by comparing NOAA AVHRR images with the data from the ground truth including measurements of limnological features. In the waterside of this area, the reed grows gregariously over several km and the reed communities are formed. The vegetations of this area are covered with snow in winter, and the reed remains fallen even when spring comes. So, the reed communities may be recognized as open water on NOAA AVHRR images.