XPGR结合小波变换的南极冰盖冻融探测

doi:10.12068/j.issn.1005-3026.2014.05.010

东北大学学报:自然科学版 ›› 2014, Vol. 35 ›› Issue (5): 650-654.DOI: 10.12068/j.issn.1005-3026.2014.05.010

XPGR结合小波变换的南极冰盖冻融探测

王星东¹，李新武²，熊章强¹，梁雷²

(1中南大学地球科学与信息物理学院，湖南长沙410083; 2中国科学院遥感与数字地球研究所，北京100094)

收稿日期:2013-05-13 修回日期:2013-05-13 出版日期:2014-05-15 发布日期:2014-08-18
通讯作者: 王星东
作者简介:王星东(1982-)，男，陕西宝鸡人，中南大学博士研究生;李新武(1973-)，男，四川内江人，中国科学院遥感与数字地球研究所研究员.
基金资助:
国家自然科学基金资助项目(41076129，41274123).

Antarctic IceSheet FreezeThaw Detection Based on XPGR Combined with Wavelet Transform

WANG Xingdong¹， LI Xinwu²， XIONG Zhangqiang¹， LIANG Lei²

1 School of Geosciences and InfoPhysics， Central South University， Changsha 410083， China; 2 Institute of Remote Sensing and Digital Earth， Chinese Academy of Sciences， Beijing 100094， China.

Received:2013-05-13 Revised:2013-05-13 Online:2014-05-15 Published:2014-08-18
Contact: WANG Xingdong
About author:-
Supported by:
-

摘要/Abstract

摘要： 针对微波辐射计的交叉极化比率(crosspolarizedgradientratio，XPGR)算法在冰盖冻融探测中存在的问题，提出了不依赖于实地观测数据的XPGR结合小波变换模型进行南极冰盖冻融探测的方法，即运用小波变换模型对XPGR的长时间序列数据做小波变换，得到南极冰盖融化开始、持续和结束时间分布图.此方法由于能自动选取大量样本点且具有一定的去噪效果，不仅提高了冰盖冻融探测的计算效率、实用性和可操作性，而且还在一定程度上提高了冰盖冻融探测的精度，更好地实现了南极地区冰盖冻融监测系统建设的业务化运行目标.

关键词: 冰盖冻融探测, 微波辐射计, XPGR, 小波变换, 精度

Abstract: In view of the problem of XPGR (crosspolarized gradient ratio) algorithm existed in the icesheet freezethaw detection， an XPGR combined with wavelet transform algorithm was proposed， which did not depend on the field observations. The proposed algorithm was used in the Antarctic icesheet freezethaw detection by microwave radiometer. That was the processing for the long time series data of XPGR algorithm by the use of wavelet transform model to automatically get the distribution of Antarctic icesheet melting onset date， melting duration and melting end date. The computational efficiency， usability and operability of detecting were improved in the icesheet freezethaw detection because many samples could be automatically selected by the algorithm with certain denoising effect. To some extent， the accuracy of detecting icesheet freezing and thawing was also improved and the goal of Antarctic icesheet monitoring system construction was better achieved.

Key words: icesheet freezethaw detection, microwave radiometer, XPGR, wavelet transform, accuracy

中图分类号:

TP79

王星东，李新武，熊章强，梁雷. XPGR结合小波变换的南极冰盖冻融探测[J]. 东北大学学报:自然科学版, 2014, 35(5): 650-654.

WANG Xingdong， LI Xinwu， XIONG Zhangqiang， LIANG Lei. Antarctic IceSheet FreezeThaw Detection Based on XPGR Combined with Wavelet Transform[J]. Journal of Northeastern University Natural Science, 2014, 35(5): 650-654.

参考文献

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XPGR结合小波变换的南极冰盖冻融探测

Antarctic IceSheet FreezeThaw Detection Based on XPGR Combined with Wavelet Transform

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