Zobrazeno 1 - 10
of 22
pro vyhledávání: '"C. J. Johny"'
Autor:
Sujata Pattanayak, Suryakanti Dutta, S. Indira Rani, C. J. Johny, Sumit Kumar, Vikram Prasad, John P. George
Publikováno v:
MAUSAM. 72:107-118
Tropical Cyclones that occur over the North Indian Ocean (NIO) are warm cored, highly devastating and short-lived compared to other oceanic basins. Numerical prediction of these cyclones is mainly an initial value problem. Accuracy of the initial pos
Publikováno v:
Pure and Applied Geophysics. 176:2659-2678
Scatterometer winds are useful in weather forecasting and cyclone monitoring related activities. The Indian Space Research Organization has launched SCATSAT-1, which is a follow-up mission of the Oceansat-2 scatterometer in September 2016. It operate
Autor:
C. J. Johny, V. S. Prasad
Publikováno v:
Journal of Earth System Science. 129
India Meteorological Department (IMD) is operationally producing forecasts at T1534 resolution using NCMRWF GFS (NGFS) model and biases are reported in some regions. In order to identify the model biases and applying necessary correction measures to
Publikováno v:
Pure and Applied Geophysics. 174:2847-2862
In the tropics, efficient weather forecasts require high-quality vertical profiles of winds to overcome improper coupling of mass and wind fields and balance relationships in the region. The India Meteorological Department (IMD) operates the network
Publikováno v:
Journal of Earth System Science. 125:1509-1521
The hybrid two-way coupled 3DEnsVar assimilation system was tested with the NCMRWF global data assimilation forecasting system. At present, this system consists of T574L64 deterministic model and the grid-point statistical interpolation analysis sche
Autor:
Kumar Roy, M. Mahakur, C. J. Johny, Snehlata Tirkey, Sahadat Sarkar, Malay Ganai, R. Phani Murali Krishna, V. R. Durai, Tanmoy Goswami, Medha Deshpande, Parthasarathi Mukhopadhyay, V. S. Prasad, M. Rajeevan
Publikováno v:
Journal of Earth System Science. 128
A global forecast system model at a horizontal resolution of T1534 ( $${\sim }12.5\, \hbox {km}$$ ) has been evaluated for the monsoon seasons of 2016 and 2017 over the Indian region. It is for the first time that such a high-resolution global model
Autor:
V. S. Prasad, C. J. Johny
Publikováno v:
Journal of Earth System Science. 125:521-538
Performance of a hybrid assimilation system combining 3D Var based NGFS (NCMRWF Global Forecast System) with ETR (Ensemble Transform with Rescaling) based Global Ensemble Forecast (GEFS) of resolution T-190L28 is investigated. The experiment is condu
Publikováno v:
SPIE Proceedings.
Convective downdraft motions and related outflow wind considered as an eventual source of potential damage which can be more severe in the aviation sector. A great variety of atmospheric environments can produce these downdraft motions. These events
Publikováno v:
SPIE Proceedings.
During the month of June 2015, the South Asian (or Southwest) monsoon advanced steadily from the southern to the northwestern states of India. The progression of the monsoon had an apparent effect on the relative strength of convective storm downburs
Publikováno v:
SPIE Proceedings.
Performance of an EnVar hybrid data assimilation system based on 3D Var NGFS (NCMRWF Global Forecast System) of T574 configuration and Ensemble Kalman Filter is investigated. The experiment is conducted during the Indian monsoon season (June-Septembe