PHYSICAL DRIVERS OF THE 2013 MARINE HEATWAVE IN THE SEAS OF THE SOUTHERN JAVA-NUSA TENGGARA

IF 0.7 Q4 GEOGRAPHY, PHYSICAL

Geographia Technica Pub Date : 2022-03-22 DOI:10.21163/gt_2022.171.10

T. Maulida, A. Wirasatriya, D. Ismunarti, A. Puryajati

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引用次数: 2

Abstract

Marine heatwave (MHW) is an extreme phenomenon of warm sea surface temperature anomaly that has a destructive impact on the marine ecosystem and organisms. This phenomenon increases every year in duration, frequency, and area due to the global warming. Almost all of the world's oceans have experienced MHW, including in the seas of the southern Java-Nusa Tenggara. The lack of detailed research in this area motivated us to analyze MHW drivers. MHW was identified with the 99th percentile method and duration of ≥ 5 days as a threshold by using blended product of SST data. In 2013, an MHW event was identified in the seas of the southern Java-Nusa Tenggara. This MHW lasts for 37 days, from 8 June to 14 July. The maximum (mean) intensity of sea surface temperature anomaly reaches 2.60C (1.83C) above climatology with an average area of 36.53 × 10 km. Locally, we found that probably the positive downward shortwave radiation affected this anomaly. Furthermore, a remote process of the propagation of downwelling Kelvin wave during negative Indian Ocean Dipole may also affect this anomaly. The strong westerly wind along the equatorial Indian ocean forms downwelling Kelvin wave that propagates to the southern Java-Nusa Tenggara increasing SST in this area. Key-words: Marine heatwave, Extreme Sea surface temperature, Downwelling Kelvin wave, Remote Sensing, South Java-Nusa Tenggara

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2013年爪哇南部海域海洋热浪的物理驱动因素

海洋热浪（MHW）是一种温暖海面温度异常的极端现象，对海洋生态系统和生物具有破坏性影响。由于全球变暖，这种现象的持续时间、频率和面积每年都在增加。世界上几乎所有的海洋都经历过MHW，包括爪哇岛南部的努沙登加拉海域。缺乏这方面的详细研究促使我们分析MHW驱动因素。MHW采用第99百分位法确定，持续时间≥5天作为阈值，使用SST数据的混合乘积。2013年，在爪哇岛南部的努沙登加拉海域发现了MHW事件。该MHW为期37天，从6月8日至7月14日。海面温度异常的最大（平均）强度达到气候学以上2.60C（1.83C），平均面积为36.53×10km。此外，在负印度洋偶极子期间，下流开尔文波传播的远程过程也可能影响这种异常。沿赤道印度洋的强烈西风形成向下流的开尔文波，传播到爪哇岛南部的努沙登加拉，增加了该地区的SST。关键词：海洋热浪、极端海面温度、下涌开尔文波、遥感、南爪哇岛努沙登加拉

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来源期刊

Geographia Technica GEOGRAPHY, PHYSICAL-

CiteScore

2.30

自引率

14.30%

发文量

期刊介绍： Geographia Technica is a journal devoted to the publication of all papers on all aspects of the use of technical and quantitative methods in geographical research. It aims at presenting its readers with the latest developments in G.I.S technology, mathematical methods applicable to any field of geography, territorial micro-scalar and laboratory experiments, and the latest developments induced by the measurement techniques to the geographical research. Geographia Technica is dedicated to all those who understand that nowadays every field of geography can only be described by specific numerical values, variables both oftime and space which require the sort of numerical analysis only possible with the aid of technical and quantitative methods offered by powerful computers and dedicated software. Our understanding of Geographia Technica expands the concept of technical methods applied to geography to its broadest sense and for that, papers of different interests such as: G.l.S, Spatial Analysis, Remote Sensing, Cartography or Geostatistics as well as papers which, by promoting the above mentioned directions bring a technical approach in the fields of hydrology, climatology, geomorphology, human geography territorial planning are more than welcomed provided they are of sufficient wide interest and relevance.