Investigating the diurnal variability of trace gases in the TROpical West PACific measured by solar absorption spectrometry in the infrared (TROPAC)

• Applicant: Professor Dr. Justus Notholt
• Subject Area: Atmospheric Science
• Term: from 2022 to 2023
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 501831387

• Final Report Year: 2024

Final Report Abstract

As part of my research semester, I measured the diurnal cycle of various trace gases using the solar absorption spectrometry in the infrared spectral range in the tropical western Pacific. To do this, I carried out measurements at our station in Palau from August 6 to October 28, 2022. From March 16 to April 15 2023 I was at JPL/NASA in Pasadena/U.S.A. to evaluate these measurements. The measurements and analysis were carried out as planned. The comparison with simulated data has begun. In addition to this planned work, the cooperation with our partners in Palau was further expanded and a new project for the high-precision measurement of CO2 and CH4 was started.

Publications

• Properties of Cirrus Cloud Observed over Koror, Palau (7.3°N, 134.5°E), in Tropical Western Pacific Region. Remote Sensing, 16(8), 1448.
  Sun, Xiaoyu; Ritter, Christoph; Müller, Katrin; Palm, Mathias; Ji, Denghui; Ruhe, Wilfried; Beninga, Ingo; Patris, Sharon & Notholt, Justus