8/9/2019 NASA Membuat Peta Kedalaman Hutan Dunia Yang Pertama

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NASA membuat peta kedalaman hutan dunia yang pertama

The work - based on data collected by NASA's ICESat, Terra, and Aqua satellites --should help scientists build an inventory o how !uch carbon the world"s orests

store and how ast that carbon cycles throu#h ecosyste!s and back into theat!osphere$ %ichael &esky o the Colorado State niversity described his resultsin the (ournal )eophysical *esearch &etters$

A irst-o-its-kind #lobal !ap shows orest canopy hei#ht in shades o #reen ro! +to + !eters ./+ eet0$ 1or any patch o orest, the hei#ht shown !eans that 2+percent or !ore o the trees in the patch are that tall or taller$ Areas withoutorest are shown in tan$ Credit3 NASA Earth 4bservatory5I!a#e by 6esse Allen and*obert Si!!on57ased on data ro! %ichael &esky$

The new !ap shows the world"s tallest orests clustered in the 8aciic Northwest oNorth A!erica and portions o Southeast Asia, while shorter orests are ound inbroad swaths across northern Canada and Eurasia$ The !ap depicts avera#e hei#htover 9 square kilo!eters :$2 square !iles0 re#ions0, not the !a;i!u! hei#htsthat any one tree or s!all patch o trees !i#ht attain$

Te!perate conier orests -- which are e;tre!ely !oist and contain !assive treessuch as > eet0$ *elatively undisturbed areas in tropical rain orests were about.9 !eters ?. eet0, rou#hly the sa!e hei#ht as the oak, beeches, and birches ote!perate broadlea orests co!!on in Europe and !uch o the nited States$

8/9/2019 NASA Membuat Peta Kedalaman Hutan Dunia Yang Pertama

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A orest canopy hei#ht !ap o the conti#uous nited States$ Credit3 NASA Earth4bservatory5I!a#e by 6esse Allen and *obert Si!!on57ased on data ro! %ichael&esky$

Wheres the Carbon?

Scientiic interest in the new !ap #oes ar beyond curiosities about tree hei#ht$The !ap has i!plications or an on#oin# eort to esti!ate the a!ount o carbontied up in Earth"s orests and or e;plainin# what sops up . billion tons o @!issin#carbon each year$

Bu!ans release about billion tons o carbon annually, !ostly in the or! ocarbon dio;ide$ 4 that, / billion tons end up in the at!osphere and . billion tonsin the ocean$ It"s unclear where the last two billion tons o carbon #o, thou#hscientists suspect orests capture and store !uch o it as bio!ass throu#hphotosynthesis$

8/9/2019 NASA Membuat Peta Kedalaman Hutan Dunia Yang Pertama

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European 7eech$Credit:1orestryi!a#es$or#5niversity o est Bun#ary5Norbert 1rankD &ar#er i!a#e

An artist"s representation o ICESat in orbit$Credit:NASA5Scientiic isualiFation Studio5Chris %eaneyD &ar#er i!a#e

http://www.forestryimages.org/browse/detail.cfm?imgnum=5389138http://www.nasa.gov/images/content/470372main_beech-full.jpghttp://svs.gsfc.nasa.gov/vis/a010000/a010500/a010518/index.htmlhttp://www.nasa.gov/images/content/470379main_icesat-concept-full.jpghttp://www.nasa.gov/images/content/470372main_beech-full.jpghttp://svs.gsfc.nasa.gov/vis/a010000/a010500/a010518/index.htmlhttp://www.nasa.gov/images/content/470379main_icesat-concept-full.jpghttp://www.forestryimages.org/browse/detail.cfm?imgnum=5389138

8/9/2019 NASA Membuat Peta Kedalaman Hutan Dunia Yang Pertama

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Stand o bristlecone pine on Al!ah#re %ountain in Colorado$Credit:1orestryi!a#es$or#5S