Relationship between cloud base height retrieved from lidar and downward longwave irradiance

Kyohei Yamada; Tadahiro Hayasaka; Nobuo Sugimoto

doi:10.1117/12.977270

8 November 2012 Relationship between cloud base height retrieved from lidar and downward longwave irradiance

Kyohei Yamada, Tadahiro Hayasaka, Nobuo Sugimoto

Proceedings Volume 8523, Remote Sensing of the Atmosphere, Clouds, and Precipitation IV; 85231Q (2012) https://doi.org/10.1117/12.977270
Event: SPIE Asia-Pacific Remote Sensing, 2012, Kyoto, Japan

Abstract

Downward longwave radiation is a key process to understand the climate change, energy budget, and water cycle at the earth’s surface. Cloud is a dominant factor to determine the intensity of longwave radiation. It is widely known that cloud cover and cloud base height (CBH) have strong effects on the downward longwave radiation, however there are not so many studies regarding the quantitative evaluation of relationship between cloud properties and downward longwave radiation. The intent of the present study is to quantify the impact of cloud property on the downward longwave irradiance (DLI). We used the data obtained with CGR-4 pyrgeometer at Tateno, Japan for the period from January 2002 to December 2011. Cloud radiative contribution fraction (CRC) is evaluated with a ratio of the difference of DLI between observation under cloudy sky without precipitation and calculation assumed clear-sky condition to the observed DLI. The difference between calculation and observation is -4.60±3.00 W/m², and the calculation method reproduced to observation. Cloud is classified into three types by CBH, low (CBH<2000 m), middle (2000≥CBH<5000 m), and high (CBH≥5000 m). In the results, CRC is almost proportional and inverse proportional to cloud cover (CC) and CBH in the average, respectively. However, CRC for low cloud shows proportion to CBH because existence of low altitude cloud is related to large precipitable water (PW).

Citation Download Citation

Kyohei Yamada, Tadahiro Hayasaka, and Nobuo Sugimoto "Relationship between cloud base height retrieved from lidar and downward longwave irradiance", Proc. SPIE 8523, Remote Sensing of the Atmosphere, Clouds, and Precipitation IV, 85231Q (8 November 2012); https://doi.org/10.1117/12.977270

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
6 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Clouds

Error control coding

LIDAR

Chromium

Neodymium

Climatology

Scattering

Show All Keywords

Keywords/Phrases

Search In:

Publication Years