Quantifying Atmospheric CO2 From Space-Based Observations and Air Transport Simulations - Focusing on Ocean and Permafrost ...

• Main Author: Guan, Yifan
• Format: Article in Journal/Newspaper
• Language: English
• Published: My University 2023
• Subjects: Carbon Cycle; CO2; Satellite Observation; GEOS-Chem Simulation; Biogeochemistry; Atmospheric Sciences; FOS Earth and related environmental sciences; Atmospheric, Oceanic and Space Sciences; Science; permafrost
• Online Access: https://dx.doi.org/10.7302/8563; http://deepblue.lib.umich.edu/handle/2027.42/178106

Atmospheric carbon dioxide (CO2) accounts for the largest radiative forcing among anthropogenic greenhouse gases. There is a pressing need to understand the rate at which CO2 accumulates in the atmosphere, in both the seasonal and the interannual timescales (mainly driven by terrestrial and oceanic carbon flux), because of their relationship with climatic variations that may provide insights into long-term carbon-climate feedback. Given advances in space-based measurements of atmospheric CO2, which enables us to monitor atmospheric CO2 abundance over open ocean, and in techniques to estimate ocean air-sea exchange based on sparse surface ocean observations, we have novel opportunities to refine our understanding of the ocean influence on atmospheric CO2 variation at the interannual timescale. Meanwhile, it remains challenging for current satellite missions to quantify and separate emissions of old carbon from permafrost from labile high-latitude carbon. This dissertation focuses on space- based observations ...