论文标题
夏季大气循环的分析及其与伊朗高原夏季降水的关系
The Analysis of Summertime Atmospheric Circulation over Iran and its relation to Summertime Precipitation In Iran Plateau
论文作者
论文摘要
为了研究伊朗高原的大气循环和夏季降水组成部分之间的关系，在1970年至2003年期间，从IRIMO获得了伊朗危险台的每日降雨数据。不同组成部分的复合图，例如压力水平，矢量风，U和vester和Vester，U和Vinds，垂直速度，垂直速度，特定的humr，olr，vortic and vortic，Vort，Vort，Vort，Vort，Vort and vort，Vort，Vort和Vort。结果表明，从5月下旬到6月初突然变化后，西南亚大气的夏季循环是正常的。在表面上确定了不同的新压力系统，例如Zagros槽，而土耳其的土耳其水槽则在700 hpa水平的土耳其槽中鉴定出来。在建立伊朗中部和上层对流层的亚热带高压期间，西南亚的夏季循环达到了其最高的强度和膨胀，并持续到8月中旬。另一方面，土库曼斯坦反气管和巴基斯坦低点的建立造成了120天的锡斯坦风，阿拉伯半岛和扎格罗斯槽的高压发展导致了shomal风。夏季降水的主要区域被确定为58.30 E以东的三角形区域，在28.30 N. n。的概要模式中，负责该地区的夏季降水分为四类，因为伊朗低压，季风抑郁症，巴基斯坦低压和局部对流细胞。伊朗的低压造成了夏季降雨量的65％以上，而季风和巴基斯坦低调仅产生了降雨的15％。产生雨水系统的大部分水分都来自阿曼海西部和西北阿拉伯海，西南流量低于850hpa水平。
In order to study the relation between the components of atmospheric circulation and summer precipitation over the Iranian plateau, daily rainfall data of synoptic stations of Iran were obtained from IRIMO for the period 1970 to 2003. Composite maps of different components such as pressure levels, vector wind, U and V winds, vertical velocity, Specific humidity, OLR, streamlines, vorticity, and the temperature was drawn and analyzed. The results showed that the summer circulation of the atmosphere over South West Asia after a sudden change from late May to early June was established in its normal position. Different new pressure systems such as Zagros Trough were identified over the surface and the Turkmenistan Anticyclone, the quasi-stationary trough of east Turkey at 700 hPa level. During the establishment of Subtropical High Pressure in the middle and upper troposphere over Iran, the summer circulation of southwest Asia reached its highest intensity and expansion and continued to mid-August. On the other hand, the establishment of the Turkmenistan Anticyclone and Pakistan Low caused the 120 days winds of Sistan, and the development of High pressure over the Arabian Peninsula and Zagros Trough resulted in the Shomal wind. The main region of summer precipitation was identified as a triangular area to the east of 58.30 E and south of 28.30 N. Synoptic patterns responsible for the summer precipitation of the area are grouped into four categories as Iran low pressure, Monsoon Depression, Pakistan low pressure, and local convective cells. Iran low pressure was responsible for more than 65 percent of summer rainfall, while the Monsoon and Pakistan lows produced only 15 percent of the rain. Most of the moisture of rain generating systems came from the west of Oman sea and the northwest Arabian sea via the southwesterly flow below 850hPa level.
