scholarly journals A mean-sea-level pressure time series for Trieste, Italy (1841–2018)

2021 ◽  
Vol 13 (7) ◽  
pp. 3363-3377
Author(s):  
Fabio Raicich ◽  
Renato R. Colucci
Keyword(s):  
Time Series ◽  
Sea Level ◽  
Historical Documents ◽  
Sea Level Pressure ◽  
Mean Sea Level ◽  
Level Pressure ◽  
Pressure Time ◽  
Hourly Data ◽  
Quality Checks ◽  
Basic Quality

Abstract. A time series of mean-sea-level pressure was built from observations performed in Trieste from 1 January 1841 to 31 December 2018. Original historical documents provided information on the instruments and on the observation sites. Mercury barometers have always been available. Until 1877 they represented the only instruments in operation, while from 1878 onwards barograph records became available. The time series consists of mean daily values that were computed from 24-hourly data, when possible, or otherwise adjusted to 24 h means on the basis of climatological daily pressure cycles. The time series was homogenized on the basis of the available metadata, reducing pressure to 0 ∘C and to mean sea level. Basic quality checks were applied, including the comparison with pressure time series from nearby stations. As a result, the data prior to 1865 turned out to be suspect. A mean-sea-level pressure trend of 0.5 ± 0.2 hPa per century was estimated for the 1865–2018 period. The data are available through PANGAEA (https://doi.org/10.1594/PANGAEA.926896; Raicich and Colucci, 2021).

scholarly journals A mean-sea-level pressure time series for Trieste, Italy (1841–2018)

2021 ◽  
Author(s):  
Fabio Raicich ◽  
Renato R. Colucci
Keyword(s):  
Time Series ◽  
Sea Level ◽  
Historical Documents ◽  
Sea Level Pressure ◽  
Mean Sea Level ◽  
Level Pressure ◽  
Pressure Time ◽  
Hourly Data ◽  
Quality Checks ◽  
Basic Quality

Abstract. A time series of mean-sea-level pressure was built from observations performed in Trieste from 1 January 1841 to 31 December 2018. Original historical documents provided information on the instruments and on the observation sites. Mercury barometers have been always available. Until 1877 they represented the only instruments in operation, while from 1878 onwards barograph records became available. The time series consists of mean daily values, that were computed from 24 hourly data, when possible, or otherwise adjusted to 24-hr means on the basis of climatological daily pressure cycles. The time series was homogenized on the basis of the available metadata, reducing pressure to 0° C and to mean sea level. Basic quality checks were applied, including the comparison with pressure time series from nearby stations. As a result, the data prior to 1865 turned out to be suspect. A mean-sea-level pressure trend of 0.5 ± 0.2 hPa per century was estimated for the 1865–2018 period. The data are available through PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.926896; Raicich and Colucci, 2021).

scholarly journals KAJIAN PERTUMBUHAN AWAN HUJAN PADA SAAT BANJIR BANDANG BERBASIS CITRA SATELIT DAN CITRA RADAR (STUDI KASUS : PADANG, 2 NOVEMBER 2018)

2019 ◽  
Vol 6 (2) ◽  
pp. 1-6
Author(s):  
Abdul Hamid Al Habib ◽  
Yoga Wahyu Pradana ◽  
Dany Pangestu ◽  
Paulus Agus Winarso ◽  
Jusa Sujana
Keyword(s):  
Time Series ◽  
Sea Level ◽  
Sea Level Pressure ◽  
Mean Sea Level ◽  
Level Pressure

Banjir besar kembali melanda enam kecamatan di kota Padang, Sumatera Barat pada tanggal 2 November 2018.  Banjir terjadi disebabkan oleh debit sungai yang meluap akibat hujan sangat lebat yang terjadi di bagian hulu dan hilir. Dampak banjir bandang tersebut mengakibatkan 600 rumah terendam banjir, 3 jembatan putus dan menelan korban jiwa. Karena dampak tersebut maka penelitian ini dilakukan untuk meninjau kondisi suhu permukaan laut, mean sea level pressure, nilai transport uap air, streamline, data citra satelit Himawari-8 dan data citra radar cuaca C-Band. Data diolah dalam bentuk grafik dan peta spasial kemudian dilakukan analisis deskriptif yang meliputi analisis temporal dan analisis spasial. Berdasarkan hasil analisis hujan sangat lebat yang terjadi di wilayah Padang dipicu oleh gangguan cuaca skala regional berupa adanya pola shearline atau komponen zona arah lintasan angin yang mengalami perubahan secara tiba-tiba yang sejajar dengan angin horizontal dan daerah tekanan rendah yang menimbulkan konvergensi di pesisir kota Padang, kemudian nilai transport uap air yang cukup tinggi yaitu kisaran antara 700-1100 Kg/ms-1 pada lapisan 1000-300 mb. Terjadinya hujan lebat seringkali terkait dengan keberadaan awan Cumulonimbus (Cb). Hal ini dikarenakan karakteristik awan Cb dengan dimensi yang besar serta mengandung banyak partikel presipitasi seperti  air dan kristal es. Kondisi ini didukung dengan keberadaan awan Cb berdasarkan analisis time series citra satelit Himawari-8 dan nilai reflektifitas radar berada pada nilai 45-60 dBz. Pada tanggal 2 November 2018, hampir seluruh awan hujan yang muncul mempunyai ketebalan lebih dari 7 km, dimana suhu puncak awan terendah mencapai nilai      -72.5°C.

scholarly journals Tropical cyclone simulations over Bangladesh at convection permitting 4.4 km & 1.5 km resolution

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Hamish Steptoe ◽  
Nicholas Henry Savage ◽  
Saeed Sadri ◽  
Kate Salmon ◽  
Zubair Maalick ◽  
...  
Keyword(s):  
Wind Speed ◽  
Tropical Cyclone ◽  
Sea Level ◽  
Tropical Cyclones ◽  
Weather Forecasting ◽  
Sea Level Pressure ◽  
Mean Sea Level ◽  
Level Pressure ◽  
Medium Range ◽  
Gust Speed

AbstractHigh resolution simulations at 4.4 km and 1.5 km resolution have been performed for 12 historical tropical cyclones impacting Bangladesh. We use the European Centre for Medium-Range Weather Forecasting 5th generation Re-Analysis (ERA5) to provide a 9-member ensemble of initial and boundary conditions for the regional configuration of the Met Office Unified Model. The simulations are compared to the original ERA5 data and the International Best Track Archive for Climate Stewardship (IBTrACS) tropical cyclone database for wind speed, gust speed and mean sea-level pressure. The 4.4 km simulations show a typical increase in peak gust speed of 41 to 118 knots relative to ERA5, and a deepening of minimum mean sea-level pressure of up to −27 hPa, relative to ERA5 and IBTrACS data. The downscaled simulations compare more favourably with IBTrACS data than the ERA5 data suggesting tropical cyclone hazards in the ERA5 deterministic output may be underestimated. The dataset is freely available from 10.5281/zenodo.3600201.

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