2009年日全食的英文介绍希望能有一份关于2009.7.22日全食的英文介绍.谢谢各位了!

2009年日全食的英文介绍希望能有一份关于2009.7.22日全食的英文介绍.谢谢各位了!
2009年日全食的英文介绍
希望能有一份关于2009.7.22日全食的英文介绍.谢谢各位了!

2009年日全食的英文介绍希望能有一份关于2009.7.22日全食的英文介绍.谢谢各位了!
The solar eclipse that will take place on Wednesday,July 22,2009 will be a total eclipse of the Sun with a magnitude of 1.080 that will be visible from a narrow corridor through northern India,eastern Nepal,northern Bangladesh,Bhutan,the northern tip of Myanmar,central China and the Pacific Ocean,including the Ryukyu Islands,Marshall Islands and Kiribati.Totality will be visible in many cities such as Surat,Varanasi,Patna,Thimphu,Chengdu,Chongqing,Wuhan,Hangzhou and Shanghai,as well as over the Three Gorges Dam.A partial eclipse will be seen from the much broader path of the Moon's penumbra,including most of South East Asia and north-eastern Oceania.
This solar eclipse is the longest total solar eclipse that will occur in the twenty-first century,and will not be surpassed in duration until June 13,2132.Totality will last for up to 6 minutes and 39 seconds,with the maximum eclipse occurring in the ocean at 02:35:21 UTC about 100 km south of the Bonin Islands,southeast of Japan.The North Iwo Jima island is the landmass with totality time closest to maximum.

Reprinted from (英文文章转自): NASA(http://www.nasa.gov/)
Total Solar Eclipse of 2009 July 22 (美国航天局的日食公告)
On Wednesday, 2009 July 22, a total eclipse of the Sun is visible from within a narrow corr...

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Reprinted from (英文文章转自): NASA(http://www.nasa.gov/)
Total Solar Eclipse of 2009 July 22 (美国航天局的日食公告)
On Wednesday, 2009 July 22, a total eclipse of the Sun is visible from within a narrow corridor that traverses half of Earth. The path of the Moon's umbral shadow begins in India and crosses through Nepal, Bangladesh, Bhutan, Myanmar and China. After leaving mainland Asia, the path crosses Japan's Ryukyu Islands and curves southeast through the Pacific Ocean where the maximum duration of totality reaches 6 min 39 s. A partial eclipse is seen within the much broader path of the Moon's penumbral shadow, which includes most of eastern Asia, Indonesia, and the Pacific Ocean.
更为详细的资料
Weather Prospects for the Eclipse - China
Past Dibrugarh, the central line moves into the mountainous
terrain that separates India and China. Peaks in the region
reach above 7,000 m and transportation is difficult and limited.
Weather observations are few in number, but the satellite-based
cloud observations show a zigzag series of ups and downs in
the average cloud amount where the path crosses between the
two countries. Each rise correlates with the windward-facing
slope of the terrain, while declines in cloudiness are found in
valleys on the leeward side. There is a general downturn to
the average cloud amount from its peak in India, but cloudiness
does not drop below 60% until the track has departed the
higher mountains and begun its journey across the plains of
China at Chengdu and Leshan.
China has its own monsoon flow, separate from that of
India because of the barrier imposed by the Plateau of Tibet
that arcs along its western border. Instead, winds bring moisture
into China from the south and east, and so the west side
of the higher terrain, where winds flow down hill, is favored
with sunnier skies.
Figure 21 shows a decline in cloudiness to between 50%
and 60% at Chengdu and Chongqing—a value that remains
more or less constant across the rest of the eclipse path through
China. Both these cities lie in the Yangtze River basin and so
the descending monsoon air warms and dries as it moves into
the valley. Between Chongqing and Yichan, the cloudiness
climbs about 10% as the track moves across the 2000-m to
3000-m peaks of the Fangdou Shan.
Once across the Fangdou Shan, the eclipse path descends
once again into the lush lowlands surrounding Wuhan. Spacebased
cloud observations show that Wuhan has sunshine
prospects slightly lower than Chongqing, but surface-based
observations give it the nod as the most promising inland site in
China. Average cloud cover derived from local weather records
(Table 17) is a discouraging 61%, one of the best in China, but
is high compared to cloud amounts at recent eclipses in other
parts of the globe.
Wuhan’s biggest advantage over sunnier sites near the
coast is the lower amount of haze and pollution. The city is
relatively compact, but open sites in the countryside have to be
sought out, as the area is extensively agricultural and sites for
large groups are at a premium. The central line of the eclipse
passes through the airport, so that sites within the city proper
may be quite suitable, and Wuhan has a good assortment of
public parks and waterside enclaves. It is an area well worth
exploring for an eclipse site, as the cleaner skies compared to
sites near Shanghai will allow the distant corona to stand out
more clearly against the sky.
East of Wuhan, the eclipse track crosses 1000-m peaks of
the Dabie Shan and descends onto the coastal plain to Shanghai
and Hangzhou. Cloud amounts bump upward over the Shan,
but then cloud percentages settle into the mid-50s on the plain,marking the best that China has to offer. It is a grimy region,
with plenty of pollution from the huge human presence, but
the eclipse is high in the sky where the effects of the brownish
haze are less evident on a sunny day.
Daily satellite images show a dynamic cloudiness across
the whole of south and central China. A broad band of deep,
cold-topped layers of overcast cloud will mark the location of
the mei-yu while broken patches of lower cloud dot the remaining
landscape. Occasionally, large areas of nearly clear skies
will open up, lingering for a day or two before re-filling with
cloud. Moreover, on rare occasions, the mei-yu seems to wither
away to scattered cloudiness, bringing large areas of sunshine
across the whole country. Examination of satellite images from
2006 and 2007 reveals that the southern boundary of the front
typically lies near Shanghai, leaving the city and the eclipse
track in an area tantalizingly close to sunnier weather. Slight
motions of the front northward or southward bring alternating
periods of overcast skies and sunshine through the month.
The climatological behavior of the front cannot be reliably
ascertained from just two years of monitoring. Longer-term
statistics award Shanghai with slightly more sunshine than
other parts of China.
Southeast of Shanghai, the eclipse track meets the coast
and moves across the South China Sea. A part of the cloudiness
associated with the monsoon climate is generated by instability
and convection driven by daytime heating, so sites along the
coast should be somewhat sunnier than those inland because
of cooling that comes with proximity to the water. Shanghai
has two airports, one inland (Hongqiao) and the other on the
coast (Pudong). Cloud statistics in Table 17 show that the average
cloudiness at Pudong is much lower than at Hongqiao
(50% versus 67%). Pudong, however, is a new airport, and
statistics from the area are only available since 2004, a period
too short to accurately reflect the climatological cloudiness.
A comparison of the four years in common between the two
airports reveals that Pudong’s cloud cover is only about 4%
lower than that at Hongqiao, a value that is much more in line
with satellite data. In a climate where cloudiness rules, this
4% difference is significant, and argues strongly for a viewing
site right on the waterfront, southeast of Shanghai where
the central line crosses the coast. One of the better choices
is at Jinshan (or Jinshanwei), a coastal city just north of the
shadow axis. Jinshan has the distinction of being the site of a
large artificial beach that is being constructed for the benefit
of Shanghai and local residents.
Beachfront sites can be windy, so prudence dictates a
retreat of a few hundred meters inland to obtain shelter from
the onshore winds. Prevailing winds in the Shanghai area are
from the south and southeast, a direction that brings the cooler
and cleaner air from the South China Sea onto the land

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