干旱区生态环境知识资源中心(Arid): Perturbations of atmospheric surface layer characteristics during the annular solar eclipse on 26 December 2019 over a semi-arid region Anantapur in southern India

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DOI	10.1016/j.jastp.2020.105467
	Perturbations of atmospheric surface layer characteristics during the annular solar eclipse on 26 December 2019 over a semi-arid region Anantapur in southern India
	Reddy, Lokeswara T.; Balakrishnaiah, G.; Reddy, Raja Obul K.; Reddy, Siva Kumar N.; Rao, Chakradhar T.; Gopal, Rama K.; Bhavyasree, A.
通讯作者	Gopal, KR
来源期刊	JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS
ISSN	1364-6826
EISSN	1879-1824
出版年	2020
卷号	211
英文摘要	The Annular Solar Eclipse (ASE) occurred on December 26, 2019, which was visible at most of the South Indian subcontinents with greater than 80% obscurity, particularly during the morning hours, and it played a crucial role in the atmospheric dynamics. For the first time, the ground-based measurements have used to investigate the fluctuations of air temperature, relative humidity, atmospheric pressure, wind speed and direction, UV-A radi-ation, and turbulence parameters on solar eclipse day over a semi-arid region, Anantapur, in Southern India. The Surface Layer (SL) meteorological parameters have abruptly changed on eclipse day (December 26, 2019) as compared to the control day (December 27, 2019). During eclipse day, the near-surface air temperature was significantly decreased (1.12 degrees C), and relative humidity increased (14.63%) after 60 min of the beginning of the eclipse, which mainly due to cooling the surface. The atmospheric pressure has reduced by 0.9 hPa during the eclipse period, and the winds speed also reduced to 0.92 ms(-1) due to the stabilization of Atmospheric Boundary Layer (ABL) and cooling in the SL. The turbulence parameters, including those are Sensible Heat Flux (SHF), Momentum Flux (MF), and Turbulent Kinetic Energy (TKE) have also reduced from 99.37 to 0.91 Wm(-2), 0.38 to 0.03 Nm(2), and 1.47 to 0.37 m(2)s(-2), respectively during the eclipse day, which mainly due to eclipse cooling effect diminishing the turbulence in Atmospheric Surface Layer (ASL). The lowest values (0.18 ms(-1)) of friction velocity were observed during the eclipse day, and the Monin-Obukhov stability parameter showed a significant variation in the atmospheric from weakly unstable to neutral conditions during the eclipse day. The vertical wind speed showed downdrafts during the eclipse and even after the eclipse due to subsidence of air. The investigation revealed that the ABL dynamic process and turbulence processes are affected due to cut off of solar radiation and make the SL cooling.
英文关键词	Annular solar eclipse (ASE) Semi-arid region Meteorology Sensible heat flux Turbulent kinetic energy Monin-Obukhov stability parameter
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000591363900004
WOS关键词	PLANETARY BOUNDARY-LAYER ; 11 AUGUST 1999 ; 29 MARCH 2006 ; METEOROLOGICAL PARAMETERS ; TEMPERATURE ; TURBULENCE ; AEROSOLS ; IMPACTS ; STATION ; LIDAR
WOS类目	Geochemistry & Geophysics ; Meteorology & Atmospheric Sciences
WOS研究方向	Geochemistry & Geophysics ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/327586
作者单位	[Reddy, Lokeswara T.; Balakrishnaiah, G.; Reddy, Raja Obul K.; Reddy, Siva Kumar N.; Rao, Chakradhar T.; Gopal, Rama K.; Bhavyasree, A.] Sri Krishnadevaraya Univ, Dept Phys, Aerosol & Atmospher Res Lab, Anantapur 515003, Andhra Pradesh, India; [Reddy, Siva Kumar N.] Vikram Sarabhai Space Ctr, Space Phys Lab, Thiruvananthapuram 695022, Kerala, India
推荐引用方式 GB/T 7714	Reddy, Lokeswara T.,Balakrishnaiah, G.,Reddy, Raja Obul K.,et al. Perturbations of atmospheric surface layer characteristics during the annular solar eclipse on 26 December 2019 over a semi-arid region Anantapur in southern India[J],2020,211.
APA	Reddy, Lokeswara T..,Balakrishnaiah, G..,Reddy, Raja Obul K..,Reddy, Siva Kumar N..,Rao, Chakradhar T..,...&Bhavyasree, A..(2020).Perturbations of atmospheric surface layer characteristics during the annular solar eclipse on 26 December 2019 over a semi-arid region Anantapur in southern India.JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS,211.
MLA	Reddy, Lokeswara T.,et al."Perturbations of atmospheric surface layer characteristics during the annular solar eclipse on 26 December 2019 over a semi-arid region Anantapur in southern India".JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS 211(2020).