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

海洋热的变化与海洋-大气边界的热通量密切相关，因此在调节地球气候方面起着重要作用。然而，原位估算仍然存在很大的不确定性，海洋某些区域的采样仍然很差。ROCSTAR将通过改善海洋温度(T)和盐度(S)估算，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Argo剖面相结合，同时求解温度、盐度和区域变化的海平面贡献来实现的。由此得出的估计值覆盖整个大洋柱，相关的空间变化将与观测到的海底压力和海平面异常相一致。鉴于此，本项目的目标是：1。提高T和S场的准确性和一致性，并提供相应的真实误差估计2。将T和S估计扩展到剖面较少的区域和深海3。量化海洋的浅层和深层在地球能量和海平面平衡中所起的作用。识别海洋热热点并研究其与东南亚陆地水循环的联系。ocstar将定位在SPP1189的焦点WPA（区域海平面变化的起源）内。该项目将汇集印度洋和西太平洋的全球观测和专门案例研究，这两个地区是东南亚地区水汽和气旋和台风发展的主要来源。此外，ROCSTAR将积极参与SPP的外联活动，并开发一个概念性棋盘游戏，向非科学家解释区域海平面预算。

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.