金波文, 王慧, 张建立, 李欢, 刘秋林. 北极新奥尔松地区海平面变化和陆地垂直运动分析[J]. 武汉大学学报 ( 信息科学版), 2021, 46(4): 503-509. DOI: 10.13203/j.whugis20190205
引用本文: 金波文, 王慧, 张建立, 李欢, 刘秋林. 北极新奥尔松地区海平面变化和陆地垂直运动分析[J]. 武汉大学学报 ( 信息科学版), 2021, 46(4): 503-509. DOI: 10.13203/j.whugis20190205
JIN Bowen, WANG Hui, ZHANG Jianli, LI Huan, LIU Qiulin. Sea Level Change and Vertical Land Motion Along Ny-Alesund Coast in Arctic[J]. Geomatics and Information Science of Wuhan University, 2021, 46(4): 503-509. DOI: 10.13203/j.whugis20190205
Citation: JIN Bowen, WANG Hui, ZHANG Jianli, LI Huan, LIU Qiulin. Sea Level Change and Vertical Land Motion Along Ny-Alesund Coast in Arctic[J]. Geomatics and Information Science of Wuhan University, 2021, 46(4): 503-509. DOI: 10.13203/j.whugis20190205

北极新奥尔松地区海平面变化和陆地垂直运动分析

Sea Level Change and Vertical Land Motion Along Ny-Alesund Coast in Arctic

  • 摘要: 近百年来,全球正经历着以变暖为显著特征的变化,海水增温膨胀、陆地冰川和极地冰盖融化等因素导致全球海平面持续上升。北极新奥尔松地区现保存有典型的极地原始生态系统,客观准确地分析该地区的海平面变化,可以更好地为该地区自然生态环境监测和保护以及气候变化研究等提供基础。联合利用卫星高度计、验潮站和全球卫星导航系统(global navigation satellite system,GNSS)观测资料分析新奥尔松地区的海平面变化的线性趋势和季节性规律,通过同时段资料(1993-2018年)的分析显示,该地区地壳呈上升趋势,上升速率为(8.09±0.19) mm/a;验潮站相对海平面呈下降趋势,下降速率为(-7.31±0.36) mm/a;利用地壳运动修正后的绝对海平面上升速率为(0.78±0.41) mm/a,低于全球同期水平,与卫星高度计观测的绝对海平面变化结果具有很好的一致性,二者相差(0.23±0.46) mm/a。在进行区域海平面变化分析时,可利用GNSS修正验潮站相对海平面获得该区域的绝对海平面变化。利用修正后的海平面资料分析结果显示,新奥尔松地区海平面变化具有明显的季节性规律,每年10月-11月为季节高海平面期,3月-4月为季节低海平面期。通过海表面温度与海平面的相关性分析认为,随着海表面温度变化,海平面也发生相应的变化。

     

    Abstract:
      Objectives  Global warming has become a significant climate change in the past 100 years. And the global mean sea level continues rising caused by the thermal expansion of sea water and the melting of land-based glacier and polar ice. The Ny-Alesund area in Arctic has preserved a typical primitive polar ecosystem. The objective and accurate analysis of sea level change in this area can better provide a basis for monitoring and protection of natural ecological environment, and for the research of climate change.
      Methods   This paper analyzed the liner trend and seasonal variation of sea level change by using data of satellite altimeter, tide gauge station and global navigation satellite system (GNSS) along Ny-Alesund coast from 1993 to 2018.
      Results  The observation data at tide gauge station show that the rate of crust rise is (8.09±0.19) mm/a, and the rate of relative sea level decline is (-7.31±0.36) mm/a. So the rate of absolute sea level rise is (0.78±0.41) mm/a, which is similar to the result from observation data of satellite alti-meter with the difference of (0.23±0.46) mm/a, and is lower than the rate of global sea level rise.
      Conclusions  In the analysis of regional sea level change, we can get the absolute sea level rise with correction of tide gauge station by GNSS. The relative sea level change corrected by GNSS is characterized by significant seasonal features in Ny-Alesund. The period of seasonal high sea level is from October to November, and the period of seasonal low sea level is from March to April. The correlation analysis between sea surface temperature and sea level shows that the sea level changes with sea surface temperature.

     

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