報告題目：Ocean warming, trends and marine extremes in the East Australian Current System
報告人：Moninya Roughan教授，澳大利亞新南威爾士大學
報告時間：2024年5月21日（星期二）上午10:00-11:00
報告地點：西康路1号河海大學科學會堂102室
主持人：李俊德 教授
報告摘要：
The East Australian Current (EAC) is Australia’s strongest and most important current and is also changing rapidly as our planet warms. Here we synthesise the current knowledge on observed trends, extremes and their drivers in the EAC system, including the coastal consequences. The EAC and its anticyclonic eddies are moving further south, and transporting more warm water poleward. As a consequence, ocean heat content is rising at two-three times the global average. Coastal and offshore warming is non-uniform with latitude associated with an increase in sea surface height and eddy activity. Coastal temperatures along southeastern Australia, have risen at among the fastest rates on earth (0.5℃ per decade). At the extreme end, marine heatwaves (one of the major challenges facing marine ecosystems) are increasing in frequency and marine cold spells are decreasing. In the EAC system, trends and extremes are linked to dynamical regimes. For example, in the EAC jet transport is slowing down, and marine heatwaves are driven by air sea heat fluxes, but in the EAC Southern Extension, transport is increasing and marine heatwaves are advection driven associated with eddies. We are also seeing increasing impacts of extreme freshwater events, which we are only now beginning to quantify. This talk provides an observational and modelling framework for exploring the impacts of climate change in other boundary current systems which are also changing rapidly.
報告人簡介：
Moninya Roughan, 澳大利亞新南威爾士大學生物地球與環境科學學院教授和近岸與區域海洋學實驗室主任，新南威爾士州綜合海洋觀測系統和潛标網絡設施建設項目主任，新南威爾士州皇家學會會士，榮獲2023年新南威爾士州皇家學會克拉克獎（Clarke Medal and Lectureships in earth sciences from the Royal Society）。她長期緻力于多尺度海洋動力學、陸架動力學和海洋極值的研究，主持研發的澳大利亞東南沿海海洋數值預報系統極大地改進了對東澳大利亞海流（EAC）流系多尺度海洋動力過程的模拟。結合多源觀測資料與高精度的海洋數值模式，她取得了一系列的創新性成果，闡明了EAC的動力特征及其變異機理，揭示了EAC和中尺度渦在複雜的跨大陸架交換中的作用，解釋了多尺度海洋動力過程對海洋增溫和海洋生态系統的影響。主持完成了包括澳大利亞國家自然科學基金（Australian Research Council）、聯合國“海洋十年”等科研項目，累計科研經費超4000萬澳元。在Nature Climate Change、Nature Communications等高影響期刊累計發表學術論文120餘篇，H-指數41（Google Scholar），被引6000餘次。
