Because wetlands are indicative of the amount of water in soil, they are found all throughout the world in different climates . Temperatures vary greatly depending on the location of the wetland. Many of the world's wetlands are in temperate zones, midway between the North or South Pole and the equator. In these zones, summers are warm and winters are cold, but temperatures are not extreme. In a subtropical zone wetland, such as one along the Gulf of Mexico, a typical temperature might be . Wetlands in the tropics are much warmer for a larger portion of the year. Wetlands on the Arabian Peninsula can reach temperatures exceeding and would therefore be subject to rapid evaporation. In northeastern Siberia, which has a polar climate, wetland temperatures can be as low as . Peatlands insulate the permafrost in subarctic regions, thus delaying or preventing thawing of permafrost during summer, as well as inducing the formation of permafrost.