Interglacial Variability of Rainfall over Iran (INVARI)

目前，伊朗的降雨从11月持续到4月，主要来自阿拉伯海、红海、阿曼海和波斯湾等南部水域。因此，了解这些水体的环境变化如何影响伊朗的降雨是至关重要的，但在仪器记录之外的时间尺度上却不得而知。在这个拟议的项目中，我们计划在Jazmourian和Gavkhouni playas的两个地点钻探，以获取覆盖过去三个间冰期的沉积物。在建立这些岩心的年龄模型之后，我们的目标是在后续项目中重建伊朗东南部和中部在同一时期的降雨变化。通过比较这些数据集，我们将能够评估温度和降雨变化对伊朗温暖时期降雨形成的相对重要性，并推断持续的全球变暖是否会导致伊朗降雨量总体减少或增加。

Rainfall over Iran occurs presently from November through April and is sourced in southern water bodies such as the Arabian Sea, the Red Sea, the Oman Sea and the Persian Gulf. Understanding how environmental changes in these water bodies affect rainfall over Iran is thus of utmost importance but rather unknown on timescales beyond the instrumental record. In this proposed project we plan to drill two sites in the Jazmourian and Gavkhouni playas to retrieve sediments that cover the past three interglacial periods. After establishing the age model for these cores, we aim to reconstruct rainfall changes over southeast and central Iran during the same periods in a follow-up project. By comparing these datasets, we will be able to assess the relative importance of temperature and rainfall changes further south in shaping rainfall over Iran during warm periods, and to infer whether the ongoing global warming will lead to an overall decrease or increase in rainfall over Iran.