Identifying the top of the tropical tropopause layer from vertical mass flux analysis and CALIPSO lidar cloud observations. Export

@article{citeulike:1825355, abstract = {We identify the top of the tropical tropopause layer (TTL) by analyzing the vertical mass flux profile based on radiative transfer calculations employing observed atmospheric profiles and cloud information. We find that the top of the TTL is located at \~{}18.7 km (70 mb). We have analyzed the CALIPSO lidar cloud observations from June 2006 to February 2007, which indicates that almost no clouds occur above 19 km, consistent with the top of TTL based on vertical mass flux analyses. The total cloud fractions between 20°S and 20°N are about 0.05\% at 18.5 km, 0.5\% at 18.0 km and 5\% at 17.0 km, where the clouds with optical depth larger than 0.5 contribute up to one tenth of these total cloud fractions. The clouds above 17 km mainly originate over the West Pacific, South America, Central Africa, and South Asia.}, author = {Fu, Q. and Hu, Y. and Yang, Q.}, citeulike-article-id = {1825355}, citeulike-linkout-0 = {http://www.agu.org/journals/gl/gl0714/2007GL030099/}, day = {28}, journal = {Geophysical Research Letters}, keywords = {calipso, cirrus, utls}, month = {July}, posted-at = {2007-10-26 15:45:34}, priority = {0}, title = {Identifying the top of the tropical tropopause layer from vertical mass flux analysis and CALIPSO lidar cloud observations.}, url = {http://www.agu.org/journals/gl/gl0714/2007GL030099/}, volume = {34}, year = {2007} }

TY - JOUR ID - citeulike:1825355 L3 - citeulike-article-id:1825355 N2 - We identify the top of the tropical tropopause layer (TTL) by analyzing the vertical mass flux profile based on radiative transfer calculations employing observed atmospheric profiles and cloud information. We find that the top of the TTL is located at ~18.7 km (70 mb). We have analyzed the CALIPSO lidar cloud observations from June 2006 to February 2007, which indicates that almost no clouds occur above 19 km, consistent with the top of TTL based on vertical mass flux analyses. The total cloud fractions between 20°S and 20°N are about 0.05% at 18.5 km, 0.5% at 18.0 km and 5% at 17.0 km, where the clouds with optical depth larger than 0.5 contribute up to one tenth of these total cloud fractions. The clouds above 17 km mainly originate over the West Pacific, South America, Central Africa, and South Asia. JF - Geophysical Research Letters TI - Identifying the top of the tropical tropopause layer from vertical mass flux analysis and CALIPSO lidar cloud observations. VL - 34 KW - calipso KW - cirrus KW - utls AU - Fu, Q AU - Hu, Y AU - Yang, Q PY - 2007/07/28/ UR - http://www.agu.org/journals/gl/gl0714/2007GL030099/ ER -