Resolving ocean heat content changes by combining Space gravimetry, Argo and radar altimetry -- ROCSTAR

结合空间重力、Argo 和雷达测高解决海洋热含量变化——ROCSTAR

• 批准号: 423710026
• 负责人: Professor Dr.-Ing. Jürgen Kusche, since 8/2020
• 金额: --
• 依托单位: Lehrstuhl für Astronomische, Physikalische und Mathematische Geodäsie
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2019
• 资助国家: 德国
• 起止时间: 2018-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/423710026?language=en
• 关键词: Resolving; ocean; heat; content; changes

Changes in the ocean heat are strongly linked to the heat flux at the ocean-atmosphere boundary and therefore play a major role in modulating the Earth’s climate. However, significant uncertainties still exist in in-situ derived estimates and certain regions of the ocean are still poorly sampled. ROCSTAR, will provide new insights in the Earth’s energy budget by improving oceanic temperature (T) and salinity (S) estimates. This is accomplished by combining space geodetic data together with Argo profiles, solving for temperature, salinity and regionally varying sea level contributions simultaneously. The resulting estimates cover the entire ocean column and the associated steric changes will be consistent with both observed ocean bottom pressure and sea level anomalies. In light of this, the project aims to:1. increase the accuracy and consistency of T and S fields and provide corresponding realistic error estimates2. extend T and S estimates in regions with few profiles and in the abyssal ocean3. quantify the role which the shallow and deep layers of the ocean play in the Earth’s energy and sea level budget4. identify ocean heat hotspots and study their link to the terrestrial water cycle in Southeast AsiaROCSTAR will be positioned within SPP1189’s focus point WPA (Origin of Regional Sea level changes). The project aggregates global observations and dedicated case studies in the Indian Ocean and West Pacific, the primary sources for moisture and cyclone and Typhoon development for the southeast Asian region, will be pursued. Furthermore, ROCSTAR will actively participate in outreach activities of the SPP and develop a conceptual board game to explain the regional sea level budget to non-scientists.

海洋热量的变化与海洋-大气边界的热通量密切相关，因此在调节地球气候方面发挥着重要作用。然而，在现场得出的估计数中仍然存在着重大的不确定性，某些海洋区域的采样仍然很差。ROCSTAR将通过改进海洋温度（T）和盐度（S）的估计，为地球的能量收支提供新的见解。这是通过将空间大地测量数据与阿尔戈剖面图相结合，同时求解温度、盐度和区域变化的海平面贡献来实现的。由此产生的估计涵盖整个海洋柱，相关的空间变化将与观测到的洋底压力和海平面异常一致。有鉴于此，该项目旨在：1。提高T和S场的准确性和一致性，并提供相应的实际误差估计2。在剖面很少的区域和深海中扩大T和S估计3。量化海洋的浅层和深层在地球能量和海平面变化中所起的作用。确定海洋热热点，并研究它们与东南亚陆地水循环的联系ROCSTAR将被定位在SPP 1189的重点WPA（区域海平面变化的起源）内。该项目汇集了全球观测结果，并将在印度洋和西太平洋进行专门的案例研究，这是东南亚地区水汽和气旋及台风发展的主要来源。此外，我们也将积极参与最高人民检察院的外展活动，并开发概念性的棋盘游戏，向非科学家解释区域海平面收支。