Trend and spatial distribution of rainfall &amp; rainy days over Andaman &amp; Nicobar Islands

Kumar, Naresh; Yadav, B. P.; Tyagi, Ajit; Jaswal, A. K.

doi:10.1007/s11069-012-0173-x

Cited by 18 publications

(8 citation statements)

References 11 publications

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“…Guhathakurta et al (2011) observed decreasing frequency of heavy rainfall events over major parts of central and north India and increasing frequency in peninsular, east and northeast India. Kumar et al (2012) observed decreasing trends in heavy precipitation over the Andaman and Nicobar islands.…”

Section: Rather Heavy and Heavy Precipitationmentioning

confidence: 87%

Winter frequency of western disturbances and precipitation indices over Himachal Pradesh, India: 1977-2007

Kumar¹,

Yadav²,

Gahlot³

et al. 2015

Atmósfera

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RESUMENLos Himalayas desempeñan un papel importante en el clima y el tiempo meteorológico de la India, y controlan tanto las perturbaciones del oeste (PO) durante el invierno como el monzón del suroeste durante el verano. En los meses de invierno (diciembre a marzo), los vientos del oeste asociados con PO causan precipitaciones, en ocasiones asociadas a fuertes nevadas y extensas avalanchas sobre Himachal Pradesh. Por tal motivo, el presente estudio analiza la variabilidad temporal de la frecuencia de PO y de diversos índices de precipitación (como número de días húmedos y lluviosos, días con precipitación fuerte y muy fuerte, e intensidad de la precipitación de 1977 a 2007) en Himachal Pradesh durante el invierno. También se analizan las caracterís-ticas sinópticas asociadas con PO intensas que provocaron fuertes precipitaciones sobre la región durante el Himachal Pradesh ocurre sobre todo como resultado de las PO, tanto la precipitación total como los días con precipitación fuerte y muy fuerte han disminuido en la región. El análisis también muestra una disminución de alrededor de 25% en los días de precipitación fuerte y de 13% en la precipitación invernal total sobre Himachal Pradesh respecto de su media respectiva (de 1977 a 2007). ABSTRACTThe Himalayas have an important role in Indian weather and climate, since they control the western disturbances (WDs) during winter and the southwest monsoon during summer. During the winter months (December to March), westerly winds associated with WDs cause precipitation, sometimes along with heavy snowfall, extensive avalanches, etc., over Himachal Pradesh. Therefore, this study examined the temporal variability in the winter months frequency of WDs and various precipitation indices like wet days, rainy days, rather heavy and heavy precipitation days, and precipitation intensity during 1977 to 2007 over Himachal Pradesh. The study also examined synoptic features associated with intense WDs that caused heavy precipitation over the region trend in the frequency of WDs over this region. Since winter precipitation in Himachal Pradesh mainly occurs due to WDs, total winter precipitation and frequency of rather heavy and heavy precipitation days have decreased over the region. The analysis also shows a decrease of about 25% in heavy precipitation days and of 13% in total winter precipitation from their respective mean (from 1977 to 2007) over Himachal Pradesh.

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Section: Rather Heavy and Heavy Precipitationmentioning

confidence: 87%

Winter frequency of western disturbances and precipitation indices over Himachal Pradesh, India: 1977-2007

Kumar¹,

Yadav²,

Gahlot³

et al. 2015

Atmósfera

Self Cite

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“…If daily data of a particular month is lower than 80% in a station, the data of that month is discarded. To study the precipitation indices (Kumar et al, 2012;Brunetti et al, 2000), we divided daily precipitation into the categories shown in Table II.…”

Section: Methodsmentioning

confidence: 99%

Winter frequency of western disturbances and precipitation indices over Himachal Pradesh, India: 1977-2007

Kumar¹,

Yadav²,

Gahlot³

et al. 2015

Atm

Self Cite

View full text Add to dashboard Cite

Los Himalayas desempeñan un papel importante en el clima y el tiempo meteorológico de la India, y controlan tanto las perturbaciones del oeste (PO) durante el invierno como el monzón del suroeste durante el verano. En los meses de invierno (diciembre a marzo), los vientos del oeste asociados con PO causan precipitaciones, en ocasiones asociadas a fuertes nevadas y extensas avalanchas sobre Himachal Pradesh. Por tal motivo, el presente estudio analiza la variabilidad temporal de la frecuencia de PO y de diversos índices de precipitación (como número de días húmedos y lluviosos, días con precipitación fuerte y muy fuerte, e intensidad de la precipitación de 1977 a 2007) en Himachal Pradesh durante el invierno. También se analizan las características sinópticas asociadas con PO intensas que provocaron fuertes precipitaciones sobre la región durante el Himachal Pradesh ocurre sobre todo como resultado de las PO, tanto la precipitación total como los días con precipitación fuerte y muy fuerte han disminuido en la región. El análisis también muestra una disminución de alrededor de 25% en los días de precipitación fuerte y de 13% en la precipitación invernal total sobre Himachal Pradesh respecto de su media respectiva (de 1977 a 2007).

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“…The annual rainfall of 300-350 cm is received in a span of about 155 rainy days during two spells i.e. South-West monsoon from May to September and the North-East monsoon from November to December (Kumar et al, 2012). In addition, these islands experience cyclones in a repetitive cycle of about 50 years and the mean tidal amplitude in the A & N Island is about 1.9 m (www.…”

Section: Study Areamentioning

confidence: 99%

Biomass and vegetation carbon stock in mangrove forests of the Andaman Islands, India

et al. 2021

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The present study estimated plant biomass in mangrove forests of the Andaman Islands, India. The mean above-ground biomass was 469.20 ± 41.25 Mega-gram/ha (Mg ha -1 ), while the mean belowground biomass was 166.78 ± 12.79 Mg ha -1 . The total mean biomass of Andaman mangrove forest was 635.98 ± 12.79 Mg ha -1 and its corresponding vegetation carbon stock was 290.26 ± 24.75 Mg C ha -1. Among the 6 forest divisions, Little Andaman recorded the highest mean biomass per unit area (1,081.26 ± 424.67 Mg ha -1 ) and vegetation carbon stock (494.50 ± 194.56 Mg C ha -1 ) followed by Middle Andaman, North Andaman, Havelock, South Andaman and Baratang. Among the 25 mangrove species, Rhizophora apiculata was found to contribute the highest biomass (152.78 Mg ha -1 ) and vegetation carbon stock (69.58 Mg C ha -1 ) followed by Bruguiera gymnorhiza, and Rhizophora mucronata. High vegetation carbon stock in mangrove forests of the Andaman Island could be attributed to high structural complexity, high precipitation rate ([ 300 cm year -1 ), and comparatively fewer anthropogenic disturbances in the mangrove forest of the Andaman Islands. However, the Andaman Islands are increasingly vulnerable to natural calamities, like sealevel rise and associated soil erosion and increasing frequency of tropical cyclones, which call for immediate attention on preserving the island mangroves to sustain its extraordinary carbon storage capacity.

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Trend and spatial distribution of rainfall & rainy days over Andaman & Nicobar Islands

Cited by 18 publications

References 11 publications

Winter frequency of western disturbances and precipitation indices over Himachal Pradesh, India: 1977-2007

Winter frequency of western disturbances and precipitation indices over Himachal Pradesh, India: 1977-2007

Winter frequency of western disturbances and precipitation indices over Himachal Pradesh, India: 1977-2007

Biomass and vegetation carbon stock in mangrove forests of the Andaman Islands, India

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