Posts

Descending Cirrus clouds characteristics over Gadanki (Tirupati, Andhra Pradesh). Our research published

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Our long awaited publication exploring the Descending Cirrus clouds over Gadanki. Int'l. Journal of Remote Sensing It is the story of Cirrus clouds which descends / ascends altitude ..... their characteristic properties ....using NARL's long term Lidar data. Nellore Manoj Kumar, Kannan Venkatramanan, Anish Kumar M. Nair & Shekatam Satheesh Kumar   (2020)   On the characterization of descending nature of cirrus clouds over a tropical site, Gadanki,   International Journal of Remote Sensing,   41:17,   6550-6569,   DOI:  10.1080/01431161.2020.1742942 https://t.co/vpReYZZZsY https://t.co/3zJDq2KNjM https://www.tandfonline.com/doi/abs/10.1080/01431161.2020.1742942 The interesting feature of Cirrus cloud's descending & ascending are well characterized using ~6 years of lidar observations. The study roots back to the inspiration from my earlier work published in J.Geophysicsl Research in 2012 Nair,  A. K. M.   ,  K. Rajeev ,  M. K. Mishra ,  B. V. Tham

Our latest publication on "modelling Pool of inhibited cloudiness"

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Our collaborative research article Sensitivity of climate models in relation to the “pool of inhibited cloudiness” over South of the Bay of Bengal  is published in the International Journal of Climatology recently. [ click to view the paper ] / [ click here to download the paper ] It is on evaluation of CMIP5 models and suites of CFSv2 in capturing a region known as "Pool of inhibited cloudiness" [ click to view the base paper ] over the southwest Bay of Bengal region. This region was actually identified based on satellite observation by Nair et al. (2011)   However, the fidelity of climate models were not evaluated to capture this region of suppressed convection (surrounded by region of deep convection). Climate models (cmip5 and CFSv2 default) shows difficulties in simulating the region. However, improved cloud physics seem to have played an important role in capturing the complex process Present Paper: Roy, K., Mukhopadhyay, P., Murali

Annular Solar Eclipse of 26 December 2019 (Simulated)

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🌞Eclipses 🌚  are heavenly visual feasts of celestial bodies hide and seek game with light and shadow. Indeed, they are rare events ! We need to be in the right place 🗺 and at right time  ⌚ to watch an eclipse unfurl. 💥How about watching a future eclipse now ? Yes, it is possible !   Curious to know ? 🤔 We can simulate it in our PC 💻 and enjoy. No need to travel far off. It would be truly interesting to watch it in advance and later wait at the right place to witness it. ❓ How to simulate a heavenly event ? Use the free open source Astronomy software  "Stellarium"  - to enjoy the realistic sky.⭐🌟⋆ It can be downloaded at  https://stellarium.org/ Set the location (latitude, longitude), change the time, play and watch !!! This would be really interesting and rewarding activity.  Now, let us see how an  Annular Solar Eclipse of  26 December 2019  📅 look like. An Annular Solar Eclipse takes place when the Moon is more farther from the Ea

Unraveling of cloud types during phases of monsoon intra‐seasonal oscillations by a Ka‐band Doppler weather radar - Atmospheric Science Letters

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Our paper published in the Atmospheric Science Letters on different types of clouds during monsoon phases. The study was mainly carried out using Ka-band doppler weather radar of IITM. https://rmets.onlinelibrary.wiley.com/doi/abs/10.1002/asl.847 Chakravarty, K., Pokhrel, S., Kalshetti, M., Nair, A. K. M., Kalapureddy, M. C. R., Deshpande, S. M., … Goswami, B. N. (2018). Unraveling of cloud types during phases of monsoon intra-seasonal oscillations by a Ka-band Doppler weather radar. Atmospheric Science Letters , 19 (9), e847. http://doi.org/10.1002/asl.847 https://doi.org/10.1002/asl.847

Enhanced daytime occurrence of clouds in the tropical upper troposphere over land and ocean -Atmospheric Research

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Our article "Enhanced daytime occurrence of clouds in the tropical upper troposphere over land and ocean" published in Atmospheric Research  Gupta, A. K., Rajeev, K., Sijikumar, S., & Nair, A. K. M. (2018). Enhanced daytime occurrence of clouds in the tropical upper troposphere over land and ocean. Atmospheric Research , 201 (October 2017), 133–143. http://doi.org/10.1016/j.atmosres.2017.10.018 https://www.sciencedirect.com/science/article/pii/S0169809517302235

Cloud feedback regulating the “pool of inhibited cloudiness”

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Our latest paper on the "Role of cloud feedback in regulating the “pool of inhibited cloudiness” over the Bay of Bengal" published in Springer Nature's  Meteorology and Atmospheric Physics . https://goo.gl/bNdLFg Read & Share Full Article here: http://rdcu.be/wOmz Anish Kumar M. Nair,  T. N. Rao and  K. Rajeev   Reference .bib   @Article{nair2017,   author   = {Nair, Anish Kumar M. and Rao, T. Narayana and Rajeev, K.},   title    = {Role of cloud feedback in regulating the “pool of inhibited cloudiness” over the Bay of Bengal},   journal  = {Meteorology and Atmospheric Physics},   year     = {2017},   pages    = {1--12},   month    = {10},   issn     = {0177-7971},   abstract = {Cloud-circulation feedback by latent heating (LH) is a major contributor for driving atmospheric circulation. This study examines the potential role of spatial variations of LH in driving a mini-circulation for generating the “pool of inhibited cloudiness”, where cloud formation i

TV interview with Dr.Suresh Babu, Scientist, SPL, VSSC, ISRO

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Congrats Dr. Suresh Babu for bagging the prestigious Shanthi Swarup Bhatnagar Prize 2017. CLICK HERE  Proud of you...!!! Wishing you and team more success !!