Seasonal Features and a Case Study of Tropopause Folds over the Tibetan Plateau
المؤلفون المشاركون
Luo, Jiali
Liang, Wenjun
Xu, Pingping
Xue, Haiyang
Zhang, Min
Shang, Lin
Tian, Hongying
المصدر
العدد
المجلد 2019، العدد 2019 (31 ديسمبر/كانون الأول 2019)، ص ص. 1-12، 12ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2019-11-25
دولة النشر
مصر
عدد الصفحات
12
التخصصات الرئيسية
الملخص EN
Tropopause fold is the primary mechanism for stratosphere-troposphere exchange (STE) at the midlatitudes.
Investigation of the features of tropopause folds over the Tibetan Plateau (TP) is important since the TP is a hotspot in global STE.
In this study, we investigated seasonal features of the tropopause fold events over the TP using the 40-year ERA-Interim reanalysis data.
The development of a tropopause folding case is specifically examined.
The results show that shallow tropopause folds occur mostly in spring, while medium and deep folds occur mostly in winter.
The multiyear mean monthly frequency of shallow tropopause folds over the TP reaches its maximum value of about 7% in May and then decreases gradually to its minimum value of 1% in August and increases again since September.
Deep folds rarely occur in summer and autumn.
Both the seasonal cycle and seasonal distribution of total tropopause folds over the TP are dominated by shallow folds.
The relative high-frequency areas of medium and deep folds are located over the southern edge of the TP.
The westerly jet movement controls the displacement of the high-frequency folding region over the TP.
The region of high-frequency tropopause folds is located in the southern portion of the plateau in spring and moves northward in summer.
The jet migrates back to the south in autumn and is located along about 30°N in winter, and the region where folds occur most frequently also shifts southward correspondingly.
A medium fold event that occurred on 29 December 2018 is used to demonstrate the evolution of a tropopause fold case over the TP in winter; that is, the folding structure moves from west to east, the tropopause pressure is greater than 320 hPa over the folding region, while it is about 200 hPa in the surrounding areas, and the stratospheric air with high potential vorticity (PV) is transported from the high latitudes to the plateau by meridional winds.
A trajectory model result verifies the transport pathway of the air parcels during the intrusion event.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Luo, Jiali& Liang, Wenjun& Xu, Pingping& Xue, Haiyang& Zhang, Min& Shang, Lin…[et al.]. 2019. Seasonal Features and a Case Study of Tropopause Folds over the Tibetan Plateau. Advances in Meteorology،Vol. 2019, no. 2019, pp.1-12.
https://search.emarefa.net/detail/BIM-1118653
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Luo, Jiali…[et al.]. Seasonal Features and a Case Study of Tropopause Folds over the Tibetan Plateau. Advances in Meteorology No. 2019 (2019), pp.1-12.
https://search.emarefa.net/detail/BIM-1118653
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Luo, Jiali& Liang, Wenjun& Xu, Pingping& Xue, Haiyang& Zhang, Min& Shang, Lin…[et al.]. Seasonal Features and a Case Study of Tropopause Folds over the Tibetan Plateau. Advances in Meteorology. 2019. Vol. 2019, no. 2019, pp.1-12.
https://search.emarefa.net/detail/BIM-1118653
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1118653
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
تقوم هذه الخدمة بالتحقق من التشابه أو الانتحال في الأبحاث والمقالات العلمية والأطروحات الجامعية والكتب والأبحاث باللغة العربية، وتحديد درجة التشابه أو أصالة الأعمال البحثية وحماية ملكيتها الفكرية. تعرف اكثر