本文關(guān)鍵詞： 青藏高原 GRACE 濾波 陸地水儲(chǔ)量變化 可變性　出處：《大地測(cè)量與地球動(dòng)力學(xué)》2017年03期 　論文類型：期刊論文

【摘要】：結(jié)合4種不同的去相關(guān)濾波和2種平滑濾波,利用5組GRACE數(shù)據(jù)反演了青藏高原及鄰區(qū)陸地水儲(chǔ)量變化趨勢(shì),研究了結(jié)果的可變性。結(jié)果表明,采用SW(P2M8)變寬度滑動(dòng)窗口去條帶效果較好,其結(jié)果中的湖水、冰川信號(hào)與衛(wèi)星測(cè)高觀測(cè)的信號(hào)位置具有較好的一致性。高斯濾波的異常幅值與扇形濾波相差10%~30%,平滑處理后異常幅值減少,觀測(cè)分辨率降低,部分湖和冰川信號(hào)甚至消失。CSR/GFZ/JPL重力場(chǎng)模型反演的結(jié)果相近,但CSR去條帶效果最好;JPL質(zhì)量模型MAS/MAS_S的結(jié)果也相近,但在高原西部有較大差異。重力場(chǎng)模型與質(zhì)量模型的結(jié)果相差很大。在利用GRACE衛(wèi)星監(jiān)測(cè)本地區(qū)陸地水儲(chǔ)量變化時(shí),推薦使用SW(P2M8)去條帶濾波器、CSR重力場(chǎng)模型數(shù)據(jù)。
[Abstract]:Combined with four different kinds of de-correlation filtering and two kinds of smoothing filtering, five sets of GRACE data were used to invert the change trend of land water reserves in the Qinghai-Xizang Plateau and its adjacent areas, and the variability of the results was studied. SWP2M8) is used to remove the strip with variable width sliding window, and the result is the lake water. The location of glacial signal is consistent with that of satellite altimetry observation. The abnormal amplitude of Gao Si filter is 10 / 30 different from that of sector filter. After smooth processing, the abnormal amplitude decreases and the observation resolution decreases. Some lake and glacier signals even disappear. The inversion results of CSR / GFZ / JPL gravity field model are similar, but CSR strip removal is the best. The results of JPL quality model MAS/MAS_S were similar. But there is a big difference in the western plateau. The results of the gravity field model and the mass model are very different. The GRACE satellite is used to monitor the land water reserves in this area. SWT P 2 M 8) strip filter is recommended for CSR gravity field model data.
【作者單位】： 中國(guó)科學(xué)院測(cè)量與地球物理研究所大地測(cè)量與地球動(dòng)力學(xué)國(guó)家重點(diǎn)實(shí)驗(yàn)室;中國(guó)科學(xué)院大學(xué);地殼運(yùn)動(dòng)監(jiān)測(cè)工程研究中心;
【基金】：國(guó)家自然科學(xué)基金(41431070,41174016,41274026,41204013) 國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(2012CB957703) CAS/SAFEA國(guó)際合作項(xiàng)目創(chuàng)新研究團(tuán)隊(duì)(KZZD-EW-TZ-05)~~
【分類號(hào)】：P223;P332
【正文快照】： 青藏高原是全球中低緯度地區(qū)最大的現(xiàn)代冰川區(qū),對(duì)氣候變化非常敏感。利用GRACE衛(wèi)星重力反演青藏高原及其鄰區(qū)陸地水儲(chǔ)量變化(terrestrial water storage change,TWSC),分離水文循環(huán)要素,對(duì)水資源管理、全球變化研究具有重要意義[1]。反演TWSC一般利用發(fā)布的二級(jí)數(shù)據(jù),即重力場(chǎng)

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