Spatial changes in soil vulnerability to extreme temperatures in Türkiye


Tekkanat İ. S., Öztürk B.

TÜCAUM 2022 International Geography Symposium , Ankara, Turkey, 12 - 14 October 2022, pp.253-263

  • Publication Type: Conference Paper / Full Text
  • City: Ankara
  • Country: Turkey
  • Page Numbers: pp.253-263
  • Çanakkale Onsekiz Mart University Affiliated: Yes

Abstract

Soil temperature (Ts) parameter is an important parameter in ecology, agrometeorology and agroclimatology. Especially its role in global climate change has been emphasized frequently for the last 10 years. However, it is also reflected in national and international institutional reports that Ts changes in climate change are one of the least studied research topics. So far, analysis of vulnerability to extreme soil temperatures has not been conducted in Türkiye, which is extremely vulnerable to climate change. Here, we analyze the vulnerability of the soil to low and high temperature values at a depth of 5 cm in Türkiye. In this context, daily Ts data of 193 meteorology stations for the period 1975-2018 and Sviličić et al. (2016) methodology was used. The results show that the eastern part of the Central Anatolia Region, inner the Eastern Black Sea Subregion and the Eastern Anatolia Region, except for the Malatya and Elazig plains, have very high vulnerability to low Ts below 0 °C (𝑇𝑠𝑚𝑖𝑛 ≤ 0 °C). On the contrary, areas exposed to 𝑇𝑠𝑚𝑖𝑛 ≤ −5 °C vulnerability are more local and only observed in Erzurum-Kars District and Başkale Plain. Furthermore, in Mediterranean coastal plains (Manavgat, Anamur and Erdemli) and the Southeastern Anatolia Region, soils is more vulnerable to the critical threshold of 35 °C (𝑇𝑠𝑚𝑎𝑘 ≥ 35 °C). Critical temperature of 45 °C (𝑇𝑠𝑚𝑎𝑘 ≥ 45 °C) never reached at 5 cm depth. Therefore, no vulnerability has been detected to the critical temperature of 45 °C in Turkish soils. Our findings demonstrate that high vulnerability due to extreme heat stresses at optimum sowing depth must be considered ensuring the sustainability of agricultural systems in all agricultural plains except the Western and Eastern Black Sea Subregion and northeastern Anatolia