Adarsh Sankaran , Ali Najah Ahmed , Ahmed El-Shafie , Mohsen Sherif , Anna Maria Antony , Krishna Anilkumar , Libina Nasarudeen Raheena , Jumna Thalakkottu Purath
{"title":"用小波相干解译极端气温指数与局地尺度气象学的遥相关关系","authors":"Adarsh Sankaran , Ali Najah Ahmed , Ahmed El-Shafie , Mohsen Sherif , Anna Maria Antony , Krishna Anilkumar , Libina Nasarudeen Raheena , Jumna Thalakkottu Purath","doi":"10.1016/j.pce.2025.104009","DOIUrl":null,"url":null,"abstract":"<div><div>This study investigates the teleconnections of Extreme Temperature Indices (ETIs) with local meteorological parameters in a multi-scale perspective. Firstly, wavelet analysis was conducted on nine extreme temperature indices (ETIs) and three local meteorological variables over six major cities in India during the period 1981–2021, with the associations was studied using Bivariate Wavelet Coherence (BWTC) and Multivariate Wavelet Coherence (MWTC) approaches. The variability of extreme temperature indices is examined with local meteorological variables like Relative Humidity (RH), Surface Pressure (PS) and Wind speed at 2 m (WS2M) of Delhi, Mumbai, Chennai, Kolkata, Kochi and Guwahati which were distinctly different in climatic conditions, population and geographical features. The study revealed that significant coherence (AWC >0.5) exists between selected extreme temperature indices and each local meteorological variable. Relative humidity is the most dominating local meteorological variable in cities Delhi and Guwahati, surface pressure in Chennai and Kochi, and wind speed in Mumbai and Kolkata. It was observed that relative humidity, surface pressure and wind speed are significant contributors to temperature indices at a scale of 8–16 months except percentile-based indices TX10p and TN90p in BWTC analysis. Multiple wavelet coherences suggest that the extremes can be better explained by combining two or more parameters and each city each city has a unique combination of local meteorological variables that together best described variances in the extreme climate indices.</div></div>","PeriodicalId":54616,"journal":{"name":"Physics and Chemistry of the Earth","volume":"140 ","pages":"Article 104009"},"PeriodicalIF":3.0000,"publicationDate":"2025-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Deciphering the teleconnections of extreme temperature indices with local scale meteorology using wavelet coherence\",\"authors\":\"Adarsh Sankaran , Ali Najah Ahmed , Ahmed El-Shafie , Mohsen Sherif , Anna Maria Antony , Krishna Anilkumar , Libina Nasarudeen Raheena , Jumna Thalakkottu Purath\",\"doi\":\"10.1016/j.pce.2025.104009\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>This study investigates the teleconnections of Extreme Temperature Indices (ETIs) with local meteorological parameters in a multi-scale perspective. Firstly, wavelet analysis was conducted on nine extreme temperature indices (ETIs) and three local meteorological variables over six major cities in India during the period 1981–2021, with the associations was studied using Bivariate Wavelet Coherence (BWTC) and Multivariate Wavelet Coherence (MWTC) approaches. The variability of extreme temperature indices is examined with local meteorological variables like Relative Humidity (RH), Surface Pressure (PS) and Wind speed at 2 m (WS2M) of Delhi, Mumbai, Chennai, Kolkata, Kochi and Guwahati which were distinctly different in climatic conditions, population and geographical features. The study revealed that significant coherence (AWC >0.5) exists between selected extreme temperature indices and each local meteorological variable. Relative humidity is the most dominating local meteorological variable in cities Delhi and Guwahati, surface pressure in Chennai and Kochi, and wind speed in Mumbai and Kolkata. It was observed that relative humidity, surface pressure and wind speed are significant contributors to temperature indices at a scale of 8–16 months except percentile-based indices TX10p and TN90p in BWTC analysis. Multiple wavelet coherences suggest that the extremes can be better explained by combining two or more parameters and each city each city has a unique combination of local meteorological variables that together best described variances in the extreme climate indices.</div></div>\",\"PeriodicalId\":54616,\"journal\":{\"name\":\"Physics and Chemistry of the Earth\",\"volume\":\"140 \",\"pages\":\"Article 104009\"},\"PeriodicalIF\":3.0000,\"publicationDate\":\"2025-06-21\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Physics and Chemistry of the Earth\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1474706525001597\",\"RegionNum\":3,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"GEOSCIENCES, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physics and Chemistry of the Earth","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1474706525001597","RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"GEOSCIENCES, MULTIDISCIPLINARY","Score":null,"Total":0}
Deciphering the teleconnections of extreme temperature indices with local scale meteorology using wavelet coherence
This study investigates the teleconnections of Extreme Temperature Indices (ETIs) with local meteorological parameters in a multi-scale perspective. Firstly, wavelet analysis was conducted on nine extreme temperature indices (ETIs) and three local meteorological variables over six major cities in India during the period 1981–2021, with the associations was studied using Bivariate Wavelet Coherence (BWTC) and Multivariate Wavelet Coherence (MWTC) approaches. The variability of extreme temperature indices is examined with local meteorological variables like Relative Humidity (RH), Surface Pressure (PS) and Wind speed at 2 m (WS2M) of Delhi, Mumbai, Chennai, Kolkata, Kochi and Guwahati which were distinctly different in climatic conditions, population and geographical features. The study revealed that significant coherence (AWC >0.5) exists between selected extreme temperature indices and each local meteorological variable. Relative humidity is the most dominating local meteorological variable in cities Delhi and Guwahati, surface pressure in Chennai and Kochi, and wind speed in Mumbai and Kolkata. It was observed that relative humidity, surface pressure and wind speed are significant contributors to temperature indices at a scale of 8–16 months except percentile-based indices TX10p and TN90p in BWTC analysis. Multiple wavelet coherences suggest that the extremes can be better explained by combining two or more parameters and each city each city has a unique combination of local meteorological variables that together best described variances in the extreme climate indices.
期刊介绍:
Physics and Chemistry of the Earth is an international interdisciplinary journal for the rapid publication of collections of refereed communications in separate thematic issues, either stemming from scientific meetings, or, especially compiled for the occasion. There is no restriction on the length of articles published in the journal. Physics and Chemistry of the Earth incorporates the separate Parts A, B and C which existed until the end of 2001.
Please note: the Editors are unable to consider submissions that are not invited or linked to a thematic issue. Please do not submit unsolicited papers.
The journal covers the following subject areas:
-Solid Earth and Geodesy:
(geology, geochemistry, tectonophysics, seismology, volcanology, palaeomagnetism and rock magnetism, electromagnetism and potential fields, marine and environmental geosciences as well as geodesy).
-Hydrology, Oceans and Atmosphere:
(hydrology and water resources research, engineering and management, oceanography and oceanic chemistry, shelf, sea, lake and river sciences, meteorology and atmospheric sciences incl. chemistry as well as climatology and glaciology).
-Solar-Terrestrial and Planetary Science:
(solar, heliospheric and solar-planetary sciences, geology, geophysics and atmospheric sciences of planets, satellites and small bodies as well as cosmochemistry and exobiology).