Temporal patterns of precipitation and vegetation variability over Botswana during extreme dry and wet rainfall seasons

Mberego Seth

摘要

ABSTRACT xml:id="joc4891-para-0001"> This study investigates the temporal evolution of extreme rainfall seasons over Botswana, and their relationships to the growing season cycle of natural vegetation. Ground‐based precipitation data and remotely sensed <fc>Advanced Very High Resolution Radiometer (AVHRR)</fc> ‐normalized difference vegetation index ( <fc>NDVI</fc> ) data are analysed for the July 1981–June 2006 period. Results confirm that Botswana's annual cycle of precipitation is characterized by substantial intra‐seasonal variation, which is resonated in natural vegetation cover. During extreme wet (dry) years, the most extreme surpluses (shortfalls) of monthly rainfall were observed in the middle of the rainfall season (January–February). While rainfall receipts during season onset and cessation may not be the highest, they were found to have strong influence on <fc>NDVI</fc> coefficient of variation. Extreme wet seasons could be distinguished from moderate wet seasons by examining their monthly peak patterns. Furthermore, the November–December period was identified through the <fc>NDVI</fc> as the critical period when extreme conditions may begin to emerge. These findings could have important implications for supporting seasonal forecasts and optimizing rainfed agricultural adaptation and natural resources management in southern Africa. </abstract> </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”xml：id =“joc4891-abs-0001”> <标题类型=“main”>抽象</ title> < P XML：ID =“JOC4891-PARA-0001”>本研究调查了博茨瓦纳极端降雨季节的时间演变，以及与天然植被生长季节周期的关系。基于地面的降水数据和远程感测到<FC>高级高分辨率辐射计（AVHRR）</ FC> -Normalized差异植被指数（<FC> NDVI </ FC>）数据，2006年7月期间分析了数据。结果证实，博茨瓦纳的沉淀循环循环循环的特点是季节性内季节性变化，其在天然植被覆盖中谐振。在极端潮湿（干）年期间，在降雨季节（1月至2月）中间观察到每月降雨的最极端盈余（不足）。虽然季节发病和停止期间的降雨收据可能不是最高的，但它们被发现对<FC> NDVI </ FC>变异系数有很大影响。通过检查每月峰值模式，可以从中等潮湿的季节区分极端潮湿的季节。此外，11月至12月期间通过<FC> NDVI </ FC>确定了极端条件可能开始出现的关键期。这些调查结果可能对支持季节性预测和优化南部非洲的雨量农业适应和自然资源管理的重要意义。 </ p> </ abstract> </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>2017年第6期</span><b style="margin: 0 2px;">|</b><span>共14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=Mberego Seth&option=202" target="_blank" rel="nofollow">Mberego Seth;</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>Asia Pacific StudiesRitsumeikan Asia Pacific UniversityBeppu Japan;</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=rainfall&option=203" rel="nofollow">rainfall;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=NDVI&option=203" rel="nofollow">NDVI;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=extreme seasons&option=203" rel="nofollow">extreme seasons;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=drought&option=203" rel="nofollow">drought;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Botswana&option=203" rel="nofollow">Botswana;</a> </p> <div class="translation"> 机译：降雨;NDVI;极端季节;干旱;博茨瓦纳; </div> </li> </ul> </div> </div> <div class="literature cardcommon" id="literaturereference" style="display:none"> <div class="similarity "> <h3 class="all_title" id="enpatent111">引文网络</h3> <div class="referencetab clearfix"> <ul id="referencedaohang"> <li dataid="referenceul">参考文献</li> <li dataid="citationul">引证文献</li> <li dataid="commonreferenceul">共引文献</li> <li dataid="commoncitationul">同被引文献</li> <li dataid="tworeferenceul">二级参考文献</li> <li dataid="twocitationul">二级引证文献</li> </ul> </div> <div class="reference_details" id="referenceList"> <ul id="referenceul"></ul> <ul id="citationul"></ul> <ul id="commonreferenceul"></ul> <ul id="commoncitationul"></ul> <ul id="tworeferenceul"></ul> <ul id="twocitationul"></ul> </div> </div> </div> <div class="literature cardcommon"> <div class="similarity "> <h3 class="all_title" id="enpatent66">相似文献</h3> <div class="similaritytab clearfix"> <ul> <li class="active" >外文文献</li> <li >中文文献</li> <li >专利</li> </ul> </div> <div class="similarity_details"> <ul > <li> <div> <b>1. </b><a class="enjiyixqcontent" href="/journal-foreign-detail/0704023002882.html">Temporal patterns of precipitation and vegetation variability over Botswana during extreme dry and wet rainfall seasons</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Mberego Seth&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Mberego Seth </a> <a href="/journal-foreign-21026/" target="_blank" rel="nofollow" class="tuijian_authcolor">International Journal of Climatology: A Journal of the Royal Meteorological Society .</a> <span>2017</span><span>,第6期</span> </span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：博茨瓦纳在极端干燥和潮湿的降雨期间，博茨瓦纳的季节图案和植被变异</span> </p> </li> <li> <div> <b>2. </b><a class="enjiyixqcontent" href="/journal-foreign-detail/070404205378.html">Temporal and spatial patterns of precipitation variability for annual, wet, and dry seasons in Turkey</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Unal Y.S.&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Unal Y.S.,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Deniz A.&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Deniz A.,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Toros H.&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Toros H.,</a> <a href="/journal-foreign-21026/" target="_blank" rel="nofollow" class="tuijian_authcolor">International Journal of Climatology: A Journal of the Royal Meteorological Society .</a> <span>2012</span><span>,第3期</span> </span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：土耳其年度，潮湿和干旱季节降水变异的时空格局</span> </p> </li> <li> <div> <b>3. </b><a class="enjiyixqcontent" href="/academic-journal-foreign_detail_thesis/0204116653995.html">Spatio-Temporal Patterns of Rainfall Variability for Wet Season over Togo in West Africa</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Pouwèréou Nimon&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Pouwèréou Nimon,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Latifou Issaou&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Latifou Issaou,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Yawo Konko&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Yawo Konko,</a> <a href="/journal-foreign-27745/" target="_blank" rel="nofollow" class="tuijian_authcolor">Open Access Library Journal .</a> <span>2020</span><span>,第1期</span> </span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：西非多哥湿季降雨变异性的时空格局</span> </p> </li> <li> <div> <b>4. </b><a class="enjiyixqcontent" href="/academic-conference-foreign_meeting-197343_thesis/020513484311.html">Temporal variability in rainfall, dry days, water balance and extreme events in northeastern Argentina</a> <b>[C]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=O. 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