Nonlinear Swept Frequency Technique for CO_2 Measurements Using a CW Laser System

摘要

The U.S. National Research Council recently identified the need for a near-term space mission of Active Sensing of CO_2 Emissions over Nights, Days, and Seasons (ASCENDS). The primary objective of the ASCENDS mission is to make CO_2 column measurements across the troposphere during the day and night over all latitudes and all seasons, and in the presence of scattered clouds. These measurements would be used to significantly reduce the uncertainties in global estimates of CO_2 sources and sinks, provide an increased understanding of the connection between climate and CO_2 exchange, improve climate models, and close the carbon budget for improved forecasting and policy decisions.