Monitoring Cirrus Cloud and Tropopause Height over Hanoi Using a Compact Lidar System
Keywords:lidar - light detection and ranging
AbstractAbstract. Cirrus clouds in the upper troposphere and the lower stratosphere have attracted great attention due to their important role and impact on the atmospheric radioactive balance. Because cirrus clouds are located high in the atmosphere, their study requires a high resolution remote sensing technique not only for detection but also for the characterization of their properties. The lidar technique with its inherent high sensitivity and resolution has become an indispensible tool for studying and improving our understanding of cirrus cloud. Using lidar technique we can simultaneously measure the cloud height, thickness and follow its temporal evolution. In this paper we describe the development of a compact and highly sensitive lidar system with the aim to remotely monitor for the first time the cirrus clouds over Hanoi (21001’42’’N, 105051’12’’W). From the lidar data collected during the year 2011. We derive the mean cloud height, location of cloud top, the cloud mean thickness and their temporal evolution. We then compare the location of the cloud top with the position of the tropopause determined the radiosonde data and found good that the distance between cloud top and tropopause remains fairly stable, indicating that generally the top of cirrus clouds is the good tracer of the tropopause. We found that the cirrus clouds are generally located at height between 11.2 to 15 km with average height of 13.4 km. Their thickness is between 0.3 and 3.8 km with average value of 1.7 km. We also compare the properties of cirrus cloud with that observed at other locations around the world based on lidar technique.
Liou, K.N., 1986. Influence of cirrus clouds on weather and climate processes: a global perspective. Mon. Wea. Rev. 114,1167-1199.
Seifert, P., Ansmann, A., Muller, D., Wandinger, U., Althausen, D., Heymsfield, A.J., Massie, S.T., Schmitt, C., 2007. Cirrus optical properties observed with lidar system, radiosonde, and satellite over the tropical Indian Ocean during the aerosol-polluted northeast and clean maritime southwest monsoon. J. Geophys. Res. 112, D17205.doi:10.1029/2006JD008352.
Beyerle, J., Schafer, H.-J., Neuber, R., Schrems, O., Macdemid, I.S., 1998. Dual wavelength lidar system observation of tropical high-altitude cirrus clouds during the ALBATROSS 1996 campaign. Geophys. Res. Lett. 25, 919-922. Bischoff, S.A., Canziani, P.O., Yuchechen, A.E., 2007. The tropopause at southern extratropical latitudes: Argentina operational rawinsonde climatology. Int. J. Climatol. 27, 189-209.
Ansmann, A., Wandinger, U., Riebesell, M., Weitkamp, C., Michaelis, W., 1992. Independent measurement of extinction and backscatter profiles in cirrus clouds by using a combined Raman elastic-backscatter lidar system. Appl. Opt. 31, 7113-7131.
Heymsfield, A.J., Platt, C.M.R., 1984. A parameterization of the particle size spectrum of ice 10 clouds in terms of the ambient temperature and the ice water content. J. Atmos. Sci. 41, 84-86-855.
Immler, F., Schrems, O., 2002. Lidar system measurements of cirrus clouds in the northern and southern midlatitudes during INCA (55°N, 53° S): a comparative study. Geophys. Res. Lett. 29 (16), 1809.doi:10.1029/2002GL015077.
Sunilkumar, S.V., Parameswaran, K., 2005. Temperature dependence of tropical cirrus properties and radioactive effects. J. Geophys. Res. 110, D13205.doi:10.1029/2004JD005426.
Sassen, K., Comstock, J.M., 2001. A midlatitude cirrus cloud climatology from the Facility for Atmospheric Remote Sensing. Part III: Radioactive properties. J. Atmos. Sci. 58,2113-2127.
Sivakumar, V., Bhavanikumar, Y., Rao, P.B., Mizutani, K., Aoki, T., Yasui, M., Itabe, T., 2003. Lidar system observed characteristics of the tropical cirrus clouds. Radio Sci. 38 (6), 1094. doi:10.1029/2002RS002719.
Heymsfield, A.J., McFarquhar, G.M., Collins, W.D., Goldstein, J.A., Valero, F.P.J., Spinhirne, J., Hart, W., Pilewskie, P., 1998. Cloud properties leading to highly reflective tropical cirrus: interpretations from CEPEX, TOGA COARE, and Kwajalein, Marshall Islands. J. Geophys. Res. 103,8805-8812.
Sassen, K., Huggins, A.W., Long, A.B., Snider, J.B., Meitin, R.J., 1990. Investigations of a winter mountain storm in Utah. part II: Mesoscale structure, supercooled liquid water development, and precipitation processes. J. Atmos. Sci. 47,1323-1350.
Ansmann, A., et al., 1993. Lidar system network observations of cirrus morphological and scattering properties during the InternationalCirrus Experiment1989: the 18 October case study and statical analysis. J. Appl. Meteorol. 32, 1608-1622.
Sassen, K., Campbell, J.R., 2001. A midlatitude cirrus cloud climatology from the Facility for Atmospheric Remote Sensing. Part I: Macrophysical and synoptic properties. J. Atmos. Sci. 58,481-496.
Reichardt, J., 1999. Optical and geometrical properties of northern mid-latitude cirrus clouds observed with a UV Raman lidar system. Phys. Chem. Earth, Part B 24, 255-260.
How to Cite
LicenseAuthors who publish with CIP agree with the following terms:
- The manuscript is not under consideration for publication elsewhere. When a manuscript is accepted for publication, the author agrees to automatic transfer of the copyright to the editorial office.
- The manuscript should not be published elsewhere in any language without the consent of the copyright holders. Authors have the right to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal’s published version of their work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are encouraged to post their work online (e.g., in institutional repositories or on their websites) prior to or during the submission process, as it can lead to productive exchanges or/and greater number of citation to the to-be-published work (See The Effect of Open Access).