A direct detection 1.6μm DIAL with three wavelengths for high accuracy measurements of vertical CO2 concentration and temperature profiles

Yasukuni Shibata; Chikao Nagasawa; Makoto Abo

doi:10.1117/12.2029359

22 October 2013 A direct detection 1.6μm DIAL with three wavelengths for high accuracy measurements of vertical CO₂ concentration and temperature profiles

Yasukuni Shibata, Chikao Nagasawa, Makoto Abo

Author Affiliations +

Proceedings Volume 8894, Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing IX; 889406 (2013) https://doi.org/10.1117/12.2029359
Event: SPIE Remote Sensing, 2013, Dresden, Germany

Abstract

The accurate vertical CO₂ profiles in the troposphere are highly desirable in the inverse techniques to improve quantification and understanding of the global budget of CO₂ and also global climate changes. Moreover, wind information is an important parameter for transport simulations and inverse estimation of surface CO₂ flux. A differential absorption lidar (DIAL) is an attractive method for obtaining vertical CO₂ profiles and we have developed an 1.6μm DIAL system to perform simultaneous measurements of CO₂ concentration, atmospheric temperature profile and wind profile. The absorption cross sections of gas and air density depends on atmospheric temperature and pressure. Then precise temperature and pressure profiles are necessary for accurate CO₂ mixing ratio measurement by DIAL. Laser beams of three wavelengths around a CO₂ absorption line are transmitted alternately to the atmosphere for simultaneous measurements of CO₂ concentration and temperature. The receiving optics include the near-infrared photomultiplier tube and a fiber Bragg grating (FBG) filter to detect a Doppler shift.

Citation Download Citation

Yasukuni Shibata, Chikao Nagasawa, and Makoto Abo "A direct detection 1.6μm DIAL with three wavelengths for high accuracy measurements of vertical CO₂ concentration and temperature profiles", Proc. SPIE 8894, Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing IX, 889406 (22 October 2013); https://doi.org/10.1117/12.2029359

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available