Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/joc.4824 |
Extension of summer climatic conditions into spring in the Western Mediterranean area | |
Jansa, A.1; Homar, V.1; Romero, R.1; Alonso, S.1,2; Guijarro, J. A.3; Ramis, C.1 | |
2017-03-30 | |
发表期刊 | INTERNATIONAL JOURNAL OF CLIMATOLOGY
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ISSN | 0899-8418 |
EISSN | 1097-0088 |
出版年 | 2017 |
卷号 | 37期号:4 |
文章类型 | Article |
语种 | 英语 |
国家 | Spain |
英文摘要 | From a local point of view, in May/June, there is an important and positive 2m temperature trend at Palma (Mallorca), which is simultaneous and highly correlated with a strong increase in the 500hPa geopotential height. This study analyses this fact as well as the observed tendencies in a wider seasonal and geographical context. We confirm the particularly high correlation between 2m temperature and 500hPa geopotential during the warm months as opposed to the much weaker correlation in winter. This suggests that mechanisms for thermal changes act differently throughout the year in this region. Besides the direct radiative effect, warm season near-surface temperatures are linked to the presence of deep anticyclones, which effectively determine the northern edge of the Hadley cell. Accordingly, the strong warming trend in the area of Palma during the warm months of the year is purportedly related to the poleward extension of the Hadley cell. The fact that May/June shows the highest low-level temperature trend among all bi-monthly series is a common regional feature over a relatively wide area over the Western Mediterranean. Different geographical patterns emerge in other periods of the year. In July/August, the strongest low-level warming area drifts to the east-northeast, towards Ukraine and Russia. Coincidentally, the 500hPa geopotential tendencies show a coherent pattern, with an intense positive trend ridge over the Western Mediterranean area in May/June, and a displacement of this ridge to the north-east in July/August. We show the connection between 500hPa geopotential height and near-surface temperature by means of a multiple lineal regression that attributes half of the local temperature tendency in Palma to the intensification of a 500hPa ridge centred over the Western Mediterranean and surroundings. |
英文关键词 | Mediterranean summer spring expansion Hadley cell deep subtropical anticyclone climate change |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000397497700020 |
WOS关键词 | POLEWARD EXPANSION ; HADLEY |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/37445 |
专题 | 气候变化 |
作者单位 | 1.UIB, Dept Phys, Grp Meteorol, Carretera Valldemossa,Km 7-5, Palma De Mallorca 07122, Mallorca, Spain; 2.Inst Mediterrani Estudis Avancats IMEDEA, Global Change Res Dept, Palma De Mallorca, Mallorca, Spain; 3.State Meteorol Agcy AEMET, Balear Is Off, Palma De Mallorca, Mallorca, Spain |
推荐引用方式 GB/T 7714 | Jansa, A.,Homar, V.,Romero, R.,et al. Extension of summer climatic conditions into spring in the Western Mediterranean area[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2017,37(4). |
APA | Jansa, A.,Homar, V.,Romero, R.,Alonso, S.,Guijarro, J. A.,&Ramis, C..(2017).Extension of summer climatic conditions into spring in the Western Mediterranean area.INTERNATIONAL JOURNAL OF CLIMATOLOGY,37(4). |
MLA | Jansa, A.,et al."Extension of summer climatic conditions into spring in the Western Mediterranean area".INTERNATIONAL JOURNAL OF CLIMATOLOGY 37.4(2017). |
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