Long-term Analysis of Aerosol Optical Depth over the Antarctic Peninsula Using Terra and Aqua MODIS Products


Günaydın E., Selbesoğlu M. O., Karabulut M. F., Oktar Ö., Çelik B., Erdoğdu I., ...More

INSTANT 2023, Trieste, Italy, 11 - 14 September 2023, pp.164

  • Publication Type: Conference Paper / Summary Text
  • City: Trieste
  • Country: Italy
  • Page Numbers: pp.164
  • Istanbul Technical University Affiliated: Yes

Abstract

Earth's atmosphere is a complex system that directly affects weather patterns and climate through the radiation balance. Incoming and outgoing radiation disturbances that cause a loss in ice sheet mass depend on interactions between ice, ocean, and atmosphere. In this respect, monitoring atmospheric parameters such as albedo, water vapor, aerosol, and their evolution over time in polar regions, especially in Antarctica, is critical for understanding and predicting global climate change. Aerosol optical depth (AOD), commonly used in atmospheric studies related to global climate change, is a measure of the extinction effect of atmospheric aerosols. In this study, AOD measurements from the Moderate Resolution Imaging Spectroradiometer (MODIS) aerosol product was analyzed over a defined area in Antarctica within the scope of bilateral cooperation (Project No: 119N650) between TUBITAK (The Scientific and Technological Research Council of Turkey) and NASB (The National Academy of Sciences of Belarus). AOD from Marambio Station, one of the ground-based Aerosol Robotic Network (AERONET) stations, was used to validate the result of MODIS AOD measurements. In this context, both Aqua and Terra AOD were examined and the long-term change trend was analyzed. One of the objectives of the study is to investigate the interaction between AOD and ice variation in Antarctica by using Terra and Aqua MODIS instruments. While there are difficulties in ground-based AOD measurements in polar regions, it is considered that satellite-based measurements will provide more availability in terms of data access and coverage. Thus, long-term analysis of validated physical parameters will contribute to global climate change studies in the future.