The Global Satellite Observing System: a Success Story
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- Category: Metereología y Oceanografía
- Published on Tuesday, 13 October 2020 06:22
- Written by Administrator2
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https://public.wmo.int/en/bulletin/global-satellite-observing-system-success-story
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by Tillmann Mohr*
The first launches of artificial satellites beginning with Sputnik on 4 October 1957 by the Soviet Union and with Explorer I by the United States of America on 2 January 1958 heralded a new era of Earth observation. A few years later, on 1 April 1960, the first meteorological satellite, TIROS–1, was launched, providing the first-ever pictures of the distribution of clouds, images previously undreamed of (Figure 1). Although the spacecraft operated only for 78 days, meteorologists worldwide were ecstatic over the pictures of Earth and its cloud cover.
Figure 1 — TIROS-I, first weather satellite image, 1 April 1960. The picture shows the New England Coast of the United States of
Delta intensifying, now a Category 2, expected to grow into a Category 3 hurricane
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- Category: Metereología y Oceanografía
- Published on Thursday, 08 October 2020 20:28
- Written by Administrator2
- Hits: 1441
Hurricane Hunters are monitoring this one very closely.
Hurricane Delta intensifying
The center of Hurricane Delta was located near latitude 24.4 North, longitude 93.1 West.
Delta is moving toward the northwest near 13 mph, and this motion with a reduction in forward speed is expected this afternoon. A turn toward the north is forecast to occur by late tonight, followed by a north-northeastward motion by Friday afternoon or Friday night.
On the forecast track, the center of Delta will move over the western Gulf of Mexico this afternoon, over the northwestern Gulf of Mexico on Friday, and then move inland within the hurricane warning area Friday afternoon or Friday night. Maximum sustained winds are near 105 mph with higher gusts.
Active Atlantic Hurricane Season Forecast for 2020 by NOAA
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- Category: Metereología y Oceanografía
- Published on Saturday, 30 May 2020 21:52
- Written by Administrator2
- Hits: 1390
maritime-executive
Hurricane image courtesy of NOAA
The National Oceanic and Atmospheric Administration (NOAA) is predicting a busy Atlantic hurricane season in 2020 in its just release forecasts.
NOAA’s Climate Prediction Center, a division of the National Weather Service is forecasting a likely range of 13 to 19 named storms (winds of 39 mph or higher), of which 6 to 10 could become hurricanes (winds of 74 mph or higher). The forecast includes 3 to 6 major hurricanes (category 3, 4 or 5; with winds of 111 mph or higher). NOAA said that it provides these ranges with a 70 percent confidence.
According to NOAA, an average Atlantic hurricane season produces 12 named storms, of which 6 become hurricanes, including 3 major hurricanes.
Advanced Cyclone Forecasting is Saving Thousands of Lives
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- Category: Metereología y Oceanografía
- Published on Wednesday, 10 June 2020 03:20
- Written by Administrator2
- Hits: 1476
The Maritime Executive.
Indian disaster response teams evacuated millions of people from Odisha and West Bengal well in advance of Amphan (NDRF)
[By Hannah Cloke]
On May 18, a massive tropical cyclone with sustained winds of nearly 150 miles per hour was barrelling across the Bay of Bengal towards the low-lying coasts of East India and Bangladesh. This supercyclonic storm Amphan (from the Thai word meaning “sky” and pronounced “um-pun”) was the biggest in the Bay of Bengal since the 1999 Odisha cyclone, which killed 15,000 people.
A few days earlier, when it was just a plain old storm, Amphan had swept through Sri Lanka, killing several people in heavy rain, floods and winds. It would go on to
Large dependency of charge distribution in a tropical cyclone inner core upon aerosol number concentration
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- Category: Metereología y Oceanografía
- Published on Monday, 30 March 2020 05:54
- Written by Administrator2
- Hits: 1420
https://progearthplanetsci.springeropen.com/track/pdf/10.1186/s40645-019-0309-7
Abstract The impacts of aerosols on the charge distribution of hydrometeors and lightning flash density in a tropical cyclone (TC) were investigated using a meteorological model coupled with an explicit lightning model. The meteorological model successfully simulated the tripole structure of charge density distribution in a TC, as reported by previous studies. The impacts of aerosols were investigated through a sensitivity experiment with changing the aerosol number concentration. The tripole structure became unclear with increasing aerosol number concentrations. The positive charge distribution located in the lower layer was not seen, and raindrops with negative charge distribution reached the surface. As a result, the vertical structure of the charge density was dipolar in the polluted case. As the