(点击右边三个点,可调整速度,电脑上可下载)
听力参考原文 ↓↓↓
[00:00.04]The American space agency NASA
[00:03.68]has launched an instrument
[00:06.04]to measure the world's carbon and methane levels
[00:10.60]in an effort to help fight climate change.
[00:14.56]The instrument is attached to a satellite
[00:18.76]called Tanager-1.
[00:21.40]It launched August 16 aboard
[00:25.44]a SpaceX Falcon 9 rocket from NASA's
[00:30.24]Vandenberg Space Force Base in California.
[00:35.12]Ground controllers reported
[00:37.96]they successfully established communications
[00:41.76]with the satellite shortly after launch.
[00:45.60]A statement from NASA said
[00:48.76]the satellite is equipped
[00:51.16]with a gas-seeking instrument
[00:54.00]powered with "imaging spectrometer technology."
[00:58.44]A spectrometer is an instrument used
[01:02.60]to study the chemical composition
[01:05.52]and structures of substances.
[01:08.80]NASA's Jet Propulsion Laboratory (JPL)
[01:14.04]developed the imaging spectrometer instrument.
[01:18.60]The joint project also involved other organizations,
[01:23.48]including Planet Labs PBC.
[01:27.36]The private company helped build
[01:30.20]the Tanager-1 satellite.
[01:32.72]Tanager-1 is one of two satellites developed
[01:38.04]as part of the public-private partnership
[01:41.68]the Carbon Mapper Coalition.
[01:44.44]The other satellite has not yet been launched.
[01:48.56]The coalition says it aims to support
[01:52.84]the collection of detailed data
[01:55.68]on methane and carbon dioxide emissions worldwide.
[02:01.44]The coalition hopes to use the data
[02:05.00]to drive reductions in methane and carbon pollution.
[02:10.16]Scientists have linked carbon and methane emissions
[02:15.28]to warming temperatures on Earth.
[02:18.28]Many climate experts blame most of the warming
[02:23.48]on pollution caused by human activities.
[02:27.68]NASA says the instrument aboard Tanager-1
[02:32.84]measures "hundreds of wavelengths of light
[02:36.76]that are reflected by Earth's surface."
[02:40.28]This method permits the instrument
[02:43.60]to find sources of carbon and methane
[02:47.36]based on the light wavelengths they show.
[02:51.28]The process produces "fingerprints"
[02:55.24]that the imaging spectrometer can identify, NASA said.
[03:00.80]This data can be used to provide
[03:04.32]highly detailed information
[03:06.76]on where the world's
[03:08.52]carbon and methane come from.
[03:11.96]The level of detail is so exact,
[03:15.00]it can even identify
[03:17.20]"individual facilities and equipment,"
[03:20.72]the space agency added.
[03:23.28]Laurie Leshin is director of the JPL,
[03:28.20]which is based in Pasadena, California.
[03:31.64]She said in a statement
[03:34.24]the imaging spectrometer technology
[03:37.88]is the product of more than 40 years
[03:40.84]of development at NASA.
[03:43.44]Leshin said such detailed emissions data
[03:48.28]can help policymakers, governments
[03:51.76]and environmental organizations worldwide.
[03:56.08]When fully operational,
[03:58.48]Tanager-1 will aim to capture data
[04:02.00]across 130,000 square kilometers
[04:07.20]of Earth's surface each day.
[04:10.64]This will permit scientists to identify
[04:15.52]specific gas clouds releasing
[04:18.64]carbon dioxide and methane.
[04:21.56]NASA said the collected data will be
[04:25.28]publicly available online
[04:27.96]at the Carbon Mapper data portal.
[04:31.88]NASA says about half of methane emissions worldwide
[04:37.24]are caused by human activities.
[04:40.24]The biggest polluters are called
[04:43.32]"super emitters,"
[04:44.96]said Carbon Mapper Coalition
[04:47.40]chief executive Riley Duren.
[04:50.52]He told the Reuters news agency that
[04:54.32]super emitters produce more than
[04:57.00]100 kilograms of methane per hour.
[05:01.48]This level of release
[05:03.76]could add up to 20 to 60 percent
[05:07.04]of an area's total emissions
[05:09.88]in some industries, Duren said.
[05:13.64]In addition, the agency noted,
[05:16.80]"There is now 50 percent more
[05:19.76]carbon dioxide in the atmosphere
[05:22.56]than there was in 1750,
[05:25.80]an increase largely due to the extraction
[05:29.56]and burning of coal, oil, and (natural) gas."
[05:34.88]Duren said in a statement
[05:37.88]the Carbon Mapper Coalition is a good example
[05:42.00]"of how organizations from different sectors
[05:45.76]are uniting around a common goal
[05:48.88]of addressing climate change."
[05:51.44]He added that having the ability
[05:55.08]to exactly identify the sources
[05:58.36]of carbon and methane
[06:00.36]"can drive significant action around the world
[06:04.52]to cut emissions now."
[06:07.16]The launch of Tanager-1 came after NASA's
[06:11.76]February deployment of the PACE satellite.
[06:16.16]It is designed to closely
[06:18.84]study the world's oceans and atmosphere.
[06:22.48]PACE stands for Plankton, Aerosol,
[06:26.72]Cloud, Ocean Ecosystem.
[06:29.68]The satellite will spend at least
[06:32.48]three years studying the environment
[06:35.80]from an orbit 676 kilometers
[06:40.16]above the Earth's surface.
[06:43.32]I'm Bryan Lynn.
__________________________
Words in This Story
emission – n. the act of sending something out such as a gas, heat, or light
reflect – n. to send back or bouncer off of something
facility – n. the place where a particular activity happens
emit – v. to send out gas, heat, light etc. into the air
extract – v. to take something out, especially by force
sector – n. one part of a country's economy
本文来自公众微信号:练英语听力
|
|