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2010年7月24日,美国国家海洋和大气管理局的管理员 Jane Lubchenco提供了一份简短的说明,指出热带风暴Bonnie 可能会给墨西哥湾深海钻井漏油事故带来的影响。报告说,热带风暴Bonnie可能会帮助消除海水表面上的石油,分散开漏油,降低海水表面上石油的浓度,而且使得漏油的生物降解更容易实现。 2010年7月28日,当热带风暴Bonnie通过了该漏油地区后,海洋和大气管理局报告说,空中的观察结果显示 墨西哥湾地区的漏油数量确实有所减少。
这张照片就是安装在NASA的海洋卫星上的MODIS(中分辨率成像光谱仪)于7月28日所拍摄的自然色彩图片。图片中可以看到在漏油所在的区域,和密西西比三角洲地区,有相对浅色的漩涡和斑点出现在海水表面。虽然有其他的因素可能导致海水反射光线的不同,特别是靠近海岸的区域,但是这些地方依然很可能就是泄露出的石油所在。但海洋和大气管理局指出,如果这些暗色光泽地区确实是漏油所在,他们也只包含很少量能够回收的石油。
在几个月的深海钻井事故中,地面气象台只有在有限的一些条件下,即在晴朗的天气下,阳光从特定的角度照射海面时,才能显示出墨西哥湾的漏油情况。想了解更多漏油的图片,以及为什么不能每天看到海面上的漏油,
请访问以下网址:http://earthobservatory.nasa.gov/Features/OilSlick/.
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A NASA MODIS Natural-color Oil Slick Image from July 28
On July 24, 2010, the administrator of the U.S. National Oceanic and Atmospheric Administration (NOAA), Jane Lubchenco, provided a briefing about the anticipated impact of Tropical Storm Bonnie http://www.nasa.gov/mission_pages/hurricanes/archives/2010/h2010_Bonnie.html on the Deepwater Horizon oil slick in the Gulf of Mexico. Bonnie was expected to help dissipate and weather the oil on the sea surface, spreading out the slick, lowering surface concentrations, and making the oil more amenable to biodegradation. On July 28, 2010, after Bonnie had passed through the region, NOAA reported less oil observed on Gulf of Mexico overflights.
The Moderate Resolution Imaging Spectroradiometer (MODIS) instrument on NASA’s Aqua satellite captured this natural-color image on July 28, 2010. Around the location of the oil leak, and around the Mississippi Delta, relatively light swirls and patches appear on the ocean surface. These areas might be oil slicks, although other factors could affect the water’s ability to reflect sunlight, especially near the shore. If these pale-hued sheens are oil-slicked areas, they contain very little recoverable oil, according to NOAA.
In the months since the Deepwater Horizon accident, the Earth Observatory has been able to show oil slicks in the Gulf of Mexico only under certain conditions, namely clear skies and sunlight hitting the water at an appropriate angle. To learn more about our oil slick images, including why the oil is not visible every day, please visit Gulf of Mexico Oil Slick Images: Frequently Asked Questions at: http://earthobservatory.nasa.gov/Features/OilSlick/.
http://www.nasa.gov/topics/earth/features/oilspill/20100728_oilspill.html
这次的漏油事件确实很严重。不仅对周边的生态环境造成严重的影响,而且还迫使各国政府重新考虑深海石油钻探的安全措施是否完善。
希望类似的事故不要再发生了。
特别值得提出的就是澳洲的大堡礁地区,据说也有丰富的深海石油储量。希望澳洲政府永远也不要批准在该地区的石油采集行为。 |
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