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，现场估算仍然存在很大的不确定性，并且海洋的某些区域仍然存在很大的不确定性。 ROCSTAR 将通过改进海洋温度 (T) 和盐度 (S) 估计来提供地球能源预算的新见解。这是通过将空间大地测量数据与 Argo 剖面相结合来解决温度和盐度来实现的。和区域变化的海平面贡献同时进行。由此产生的估计覆盖整个海洋柱，相关的空间变化将与观测到的海底压力和海平面异常一致。有鉴于此，该项目的目标是：1。以及 T 和 S 场的一致性，并提供相应的实际误差估计2。预算4.识别海洋ROCSTAR 将定位在 SPP1189 的重点 WPA（区域海平面变化的起源）范围内，该项目汇总了印度洋和西太平洋（主要区域）的全球观测结果和专门案例研究。此外，ROCSTAR 将积极参与 SPP 的外展活动，并开发一个概念棋盘游戏来解释该地区的情况。向非科学家提供的海平面预算。