Nudging of vertical profiles of meteorological parameters in one-dimensional atmospheric model: A step towards improvements in numerical simulations |
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| Authors: | D Bala Subrahamanyam S Indira Rani Radhika Ramachandran P K Kunhikrishnan |
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| Institution: | (1) Space Physics Laboratory, Vikram Sarabhai Space Centre, 695 022 Thiruvananthapuram, Kerala, India;(2) ISRO Technical Liaison Unit, Embassy of India, Paris, France |
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| Abstract: | In this article, we describe a simple yet effective method for insertion of observational datasets in a mesoscale atmospheric
model used in one-dimensional configuration through Nudging. To demonstrate the effectiveness of this technique, vertical
profiles of meteorological parameters obtained from GLASS Sonde launches from a tiny island of Kaashidhoo in the Republic
of Maldives are injected in a mesoscale atmospheric model — Advanced Regional Prediction System (ARPS), and model simulated
parameters are compared with the available observational datasets. Analysis of one-time nudging in the model simulations over
Kaashidhoo show that incorporation of this technique reasonably improves the model simulations within a time domain of +6
to +12 Hrs, while its impact on +18 Hrs simulations and beyond becomes literally null. |
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| Keywords: | Advanced Regional Prediction System (ARPS) Kaashidhoo Climate Observatory (KCO) nudging numerical simulation of atmosphere marine atmospheric boundary layer |
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