 |
 |
 |
 |
 |
 |
||
 |
 |
 |
 |
 |
| 1 | 1/1 | 返回列表 |
| 查看: 28 | 回復: 0 | |||
yexuqing木蟲之王 (文學泰斗)
太陽系系主任
|
[交流]
Wind shear enhances soil moisture influence on rapid thunderstorm growth
|
|
風切變增強了土壤濕度對快速雷暴發(fā)展的影響 ▲ 作者：Christopher M. Taylor, Cornelia Klein, Emma J. Barton, Sebastian Hahn & Wolfgang Wagner ▲鏈接： https://www.nature.com/articles/s41586-025-10045-7 ▲摘要： 對流風暴發(fā)展迅速，通過強降水、強風和閃電給當地居民帶來危害。預報系統(tǒng)通常能較好地捕獲雷暴形成的大尺度環(huán)境場，但預測單個風暴的起始位置仍是一項基本挑戰(zhàn)。已知由土壤濕度（SM）模式驅動的非均勻加熱會形成有利于在較干燥土壤上空引發(fā)對流的大氣環(huán)流，而中低層之間的風切變會增強風暴的發(fā)展。 研究組表明，SM差異與風切變的協同作用尤其有利于極端風暴的激發(fā)。通過對撒哈拉以南非洲地區(qū)220萬次午后事件的分析，研究組發(fā)現，在土壤條件有利（相對于不利）的情況下，被歸類為極端的起始事件數多出68%，在SM驅動的氣流循環(huán)與風切變誘導的云層移動方向相反的地方，風暴垂直發(fā)展最為強烈。 發(fā)展的云層順著中層風向移動，當與低層氣流方向相反時，降雨量與局地較干燥的土壤呈現強相關性。盡管這種切變條件在熱帶北非地區(qū)尤為常見，但其影響在全球范圍內有利于SM-降水負反饋。SM異質性與風切變相結合，為預測深對流在何處發(fā)展提供了潛在重要預報依據，尤其是對于發(fā)展最為迅猛的雷暴而言。 ▲ Abstract： Convective storms can develop rapidly, creating hazards to local populations through intense precipitation, strong winds and lightning. The large-scale environment in which thunderstorms develop is often well captured in forecast systems, yet predicting where individual storms will initiate remains a fundamental challenge. It is known that differential heating driven by soil moisture (SM) patterns creates atmospheric circulations that favour convective initiation over drier soils, whereas wind shear between low and mid levels can enhance storm growth. Here we show that the most extreme initiations are especially favoured over SM contrasts by means of an interaction with wind shear. Analysing 2.2?million afternoon events across sub-Saharan Africa, we find 68% more initiations classed as extreme given favourable (versus unfavourable) soil conditions, with greatest vertical storm growth occurring where SM-driven circulations oppose the direction of shear-induced cloud displacement. Developing clouds follow the mid-level wind direction and, where this opposes the low-level flow, rainfall is strongly correlated with locally drier soils. Although such shear conditions are particularly common over tropical north Africa, the effect favours negative SM–precipitation feedbacks globally. The combination of SM heterogeneity and wind shear provides a potentially important source of predictability for where deep convection develops, particularly for the most rapidly developing thunderstorms. |
回復此樓» 猜你喜歡
與隱伏礦體有關納米微粒的結構特征
已經有11人回復
-
曹建勁團隊在各種介質中發(fā)現含金屬微粒，發(fā)明微粒找礦技術，獲得8項國家發(fā)明專利授權
已經有11人回復
-
地質學論文潤色/翻譯怎么收費?
已經有70人回復
-
首次在隱伏礦體上方發(fā)現金、硫酸鉛、硝酸鉛、三氧化鎢等含金屬納米微粒
已經有8人回復
-
求助：有沒有大神有流體包裹體計算軟件
已經有0人回復
相關版塊跳轉
我要訂閱樓主 yexuqing 的主題更新
| 1 | 1/1 | 返回列表 |
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 085701環(huán)境工程專碩求調劑 +4 | 幼稚園大班打手 2026-03-08 | 4/200 |
|
|---|---|---|---|---|
|
|
[考研] 0856材料與化工290求調劑 +4 | Nebulala 2026-03-08 | 5/250 |
|
|
[考研] 288求調劑085600材料與化工 +12 | Daunrin 2026-03-07 | 14/700 |
|
|
|
[考研] 理學287分求調劑 +3 | 看看我. 2026-03-05 | 3/150 |
|
|
|
[考研] 085701環(huán)境工程專業(yè)，初試305，均過國家A區(qū)線 +7 | 卡卡來了@ 2026-03-07 | 8/400 |
|
|
|
[考研] 第一志愿上海大學，專業(yè)化學工程與技術，總分288，求調劑 +3 | 1829197082 2026-03-07 | 3/150 |
|
|
|
[考研] 化工284求調劑 +6 | 小黑想變白 2026-03-07 | 6/300 |
|
|
|
[考研] 物理學求調劑 +3 | sx宋 2026-03-05 | 3/150 |
|
|
|
[考研] 085600材料與化工 298 調劑 +11 | 小西笑嘻嘻 2026-03-03 | 11/550 |
|
|
|
[考研] 306求調劑 +7 | Bahati 2026-03-05 | 7/350 |
|
|
|
[考研] 一志愿211，0860總分286食品工程專業(yè)求調劑 +6 | 林林Winnie 2026-03-05 | 6/300 |
|
|
|
[考研] 材料學碩318求調劑 +13 | February_Feb 2026-03-01 | 13/650 |
|
|
|
[考研] 一志愿華中科技大學，化學專業(yè)344分，求調劑 +7 | 邢xing1 2026-03-02 | 7/350 |
|
|
|
[考研] 考研282分求調劑，接受跨專業(yè) +4 | 劉淄博 2026-03-04 | 7/350 |
|
|
|
[考研] 282求調劑 +7 | 夕～日 2026-03-05 | 8/400 |
|
|
|
[考研] 一志愿東北大學080500，英一數二343分求調劑 +5 | Seele_v5 2026-03-04 | 5/250 |
|
|
|
[考研] 0703化學 學碩 理工科均可 不區(qū)分研究方向 總分279求調劑 +7 | 1一11 2026-03-03 | 7/350 |
|
|
|
[考研] 291求調劑 +4 | Afy123456 2026-03-03 | 7/350 |
|
|
|
[考研] 一志愿中科大能動297求調劑，本科川大 +3 | 邵11 2026-03-03 | 3/150 |
|
|
|
[考研] 268求調劑 +6 | 好運連綿不絕 2026-03-02 | 6/300 |
|