Trends and variability in absolute indices of temperature extremes over Nigeria: linkage with <fc xmlns='http://www.wiley.com/namespaces/wiley'>NAO</fc>NAO

Abatan Abayomi A.; Abiodun Babatunde J.; Gutowski William J.; Rasaq‐Balogun Saidat O.

摘要

ABSTRACT > The present study examines trends in extreme temperature absolute indices [warmest day ( <fc>TXx</fc> ), coldest day ( <fc>TXn</fc> ), warmest night ( <fc>TNx</fc> ) and coldest night ( <fc>TNn</fc> )] using the newly homogenized daily minimum and maximum temperature series from 21 stations in Nigeria for the period 1971–2012. The indices provide an understanding of the characteristics of changing temperature, in light of the present anthropogenic global warming. Trends in the indices and the statistical significance are obtained using the modified Mann–Kendall test in the R‐package. The results show that many of the stations have significant increasing trends in the absolute indices, with the warming most pronounced in Southern Nigeria. Averaged over the country, the <fc>TXx</fc> , <fc>TXn</fc> , <fc>TNx</fc> and <fc>TNn</fc> have absolute warming trends of 0.59, 0.17, 0.67and 0.97 °C, respectively, for the 42 years since 1971. The warming rate is highest during the winter ( <fc>DJF</fc> ) season for <fc>TNn</fc> . The present study also examines the possible influence of large‐scale teleconnection patterns on extreme temperature variations by determining the correlation between the absolute indices and the North Atlantic Oscillation ( <fc>NAO</fc> ) index on monthly, seasonal and annual timescales. Our results show that warming over Nigeria during the dry season months from November to February is significantly correlated with <fc>NAO</fc> . The <fc>NAO</fc> has significant correlation with <fc>TXx</fc> and <fc>TXn</fc> in the north, and with <fc>TNx</fc> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> <div class="translation abstracttxt"> <span class="zhankaihshouqi fivelineshidden" id="abstract"> <span>机译：</span><Abstract XMLNS =“http://www.wiley.com/namespaces/wiley”type =“main”> <title type =“main”>抽象</ title> >本研究检查了极端温度绝对的趋势索引[最温暖的一天（<FC> TXX </ FC>），最冷的一天（<FC> TXN </ FC>），最温暖的夜晚（<FC> TNX </ FC>）和最冷的夜晚（<FC> TNN </ FC>）]在1971 - 2012年期间，在尼日利亚的21站使用新均质的每日最低和最高温度系列。依据目前的人为全球变暖，索引提供了对温度变化的特征的理解。使用R形包中的改性Mann-Kendall测试获得指数的趋势和统计学意义。结果表明，许多车站在绝对指数中具有显着增加的趋势，在尼日利亚南部最明显的变暖。平均在该国，<FC> TXX </ FC>，<FC> TNX </ FC>，<FC> TNX </ FC>和<FC> TNN </ FC>具有0.59,0.17的绝对变暖趋势。自1971年以来的42年，分别为0.67和0.97°C.在冬季（<FC> DJF </ FC>）季节为<FC> TNN </ FC>以来，温暖率最高。本研究还通过确定每月，季节性和年度时间尺度的绝对指数和北大西洋振荡（<FC> NaO </ FC>）指数的相关性来检查大规模拨连接模式对极端温度变化的影响。我们的研究结果表明，在11月至2月的旱季月期间，尼日利亚的变暖与<FC> NaO </ FC>显着相关。 <fc> nao </ fc>与北部的<fc> txx </ fc>和<fc> txn </ fc>具有显着相关性，以及<fc> tnx </ fc> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> </div> <div class="record"> <h2 class="all_title" id="enpatent33" >著录项</h2> <ul> <li> <span class="lefttit">来源</span> <div style="width: 86%;vertical-align: text-top;display: inline-block;"> <a href='/journal-foreign-21026/'>《International Journal of Climatology: A Journal of the Royal Meteorological Society》</a> <b style="margin: 0 2px;">|</b><span>2018年第2期</span><b style="margin: 0 2px;">|</b><span>共20页</span> </div> </li> <li> <div class="author"> <span class="lefttit">作者</span> <p id="fAuthorthree" class="threelineshidden zhankaihshouqi"> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Abatan Abayomi A.&option=202" target="_blank" rel="nofollow">Abatan Abayomi A.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Abiodun Babatunde J.&option=202" target="_blank" rel="nofollow">Abiodun Babatunde J.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Gutowski William J.&option=202" target="_blank" rel="nofollow">Gutowski William J.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Rasaq‐Balogun Saidat O.&option=202" target="_blank" rel="nofollow">Rasaq‐Balogun Saidat O.;</a> </p> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zkzz" style="display: none;">展开▼</span> </div> </li> <li> <div style="display: flex;"> <span class="lefttit">作者单位</span> <div style="position: relative;margin-left: 3px;max-width: 639px;"> <div class="threelineshidden zhankaihshouqi" id="fOrgthree"> <p>Department of Geological and Atmospheric SciencesIowa State UniversityAmes IA USA;</p> <p>Climate System Analysis Group Department of Environmental and Geographical ScienceUniversity of Cape TownSouth Africa;</p> <p>Department of Geological and Atmospheric SciencesIowa State UniversityAmes IA USA;</p> <p>Research and Training Center Nigerian Meteorological AgencyLagos Nigeria;</p> </div> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zhdw" style="display: none;">展开▼</span> </div> </div> </li> <li > <span class="lefttit">收录信息</span> <span style="width: 86%;vertical-align: text-top;display: inline-block;"></span> </li> <li> <span class="lefttit">原文格式</span> <span>PDF</span> </li> <li> <span class="lefttit">正文语种</span> <span>eng</span> </li> <li> <span class="lefttit">中图分类</span> <span><a href="https://www.zhangqiaokeyan.com/clc/1232.html" title="气候学">气候学;</a></span> </li> <li class="antistop"> <span class="lefttit">关键词</span> <p style="width: 86%;vertical-align: text-top;"> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=extreme temperature&option=203" rel="nofollow">extreme temperature;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=climate indices&option=203" rel="nofollow">climate indices;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=NAO&option=203" rel="nofollow">NAO;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Nigeria&option=203" rel="nofollow">Nigeria;</a> </p> <div class="translation"> 机译：极端温度;气候指数;NAO;尼日利亚; 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Trends and variability in absolute indices of temperature extremes over Nigeria: linkage with NAONAO

摘要