Yüksek Çözünürlüklü CCSM4 Model Verilerine Göre Son Buzul Maksimumunda (SBM) Türkiye’nin Holdridge Ekolojik Bölgeleri ve Günümüz İklim Şartlarıyla Karşılaştırılması

In this study, Holdridge ecological zones (HEZ) were created and compared for current and Last Glacial Maximum (LGM) time using CCSM4 and ERA-Interim model data, and then climatic conditions of Turkey in LGM was analyzed using CCSM4 data. According to the results, the temperature difference in LGM compared today was low around the Black Sea while it increases at south and terrestrial of Turkey. Precipitation in LGM is high at mountain regions (exclude Southwestern Taurus Mountains) while it is low in coastal and low altitude and Eastern Anatolian Regions. According to HEZ results, lower montane is not defined at LGM but montane, sub alpine, alpine and nival conditions expanded. In LGM, more humidity conditions (ratio of evaporation and precipitation) was formed in Turkey connected increasing precipitation and especially decreasing evaporation. Desert scrub and thorn woodland are not defined in LGM, thorn steppe, steppe, dry forest biomes were narrowed while other biome areas were enlarged. In conclusion, it is obtained that CCSM4 data is suitable for eastern half of Turkey, but it is not usable for western half. ABSTRACT In this study, environmental conditions during the Last Glacial Maximum (LGM) in Turkey were examined by creating Holdridge ecological zones (HEZ) using the CCSM4 climate model data (Gent et al., 2011). Here, ambient conditions in the LGM are also compared with current HEZ zones (Yılmaz, 2021) created by ERA-Interim data (Dee et al., 2011) with an enhanced resolution by Karger et al. (2017). The average monthly temperature and total monthly precipitation amounts were also compared, the differences were determined, and changes in precipitation and temperature regimes were revealed.