Climate for Station: Anzali, Gilan Province, Iran

Anzali's climate is experiencing a warming trend, with both high and low temperatures increasing over the past decade. The precipitation pattern has become slightly more evenly distributed, reflecting a subtle shift in the region's climatic dynamics.

Warming Trends in Anzali

Located in the Gilan Province of Iran, Anzali is characterised by a humid subtropical climate, known in the Köppen classification as Cfa. This coastal city benefits from the moderating effects of the Caspian Sea, which influences its temperature and precipitation patterns. Over the past decade, Anzali has experienced a notable increase in temperature, with high temperatures rising by 1.51°C (2.72°F) and low temperatures by 0.41°C (0.74°F). This recent trend is more pronounced than the all-time warming trend, where highs have increased by 0.44°C (0.79°F) and lows by 0.33°C (0.59°F). This indicates an acceleration in warming over the last ten years.

Temperature Extremes and Records

Anzali's climate is marked by significant temperature extremes, with recorded highs reaching 41.0°C (105.8°F) and lows plummeting to -11.7°C (10.9°F). Such extremes highlight the city's vulnerability to temperature fluctuations, which can impact local agriculture and water resources. The warming trends observed suggest that future temperature records may continue to be challenged, potentially exacerbating heat-related stresses in the region.

Precipitation Patterns and Distribution

The Precipitation Concentration Index (PCI) for Anzali has shown a slight decrease from a baseline of 14.4 to a current value of 13.5. The PCI is a measure of how precipitation is distributed over time, with lower values indicating a more even distribution. This slight change suggests that rainfall events are becoming marginally more evenly spread throughout the year, which could mitigate the risks of flooding and drought that are often associated with concentrated precipitation patterns.

Geographical Influences on Climate

Anzali's geographical position, nestled between the Alborz mountain range and the Caspian Sea, plays a crucial role in its climate dynamics. The mountains act as a barrier, trapping moisture-laden air from the sea, which contributes to the city's high humidity and frequent rainfall. This unique geographical setting not only influences the local climate but also the observed trends in temperature and precipitation.

Regional Climate Goals and Implications

Iran's commitment to regional climate goals, including reducing greenhouse gas emissions and adapting to climate change impacts, provides an important backdrop to Anzali's climate story. The warming trends observed in Anzali underscore the urgency of these goals, as the city grapples with the implications of rising temperatures and evolving precipitation patterns. As Anzali navigates these changes, understanding the local climate dynamics will be essential in formulating effective adaptation strategies.