8/7/2019 Ice-elevation changes of Glaciar Chico, southern Patagonia, using ASTER DEMs, aerial photographs and GPS data

1/8

Ecd-dfdv`tega cb`ahds gi Hf`ce`r Cbecg, sgutbdra ]`t`hgae`,useah @S^D\ NDJs, `dre`f pbgtghr`pbs `an H]S n`t`

@anrds \EYD\@,0,< Heag C@S@SS@,0 Oga`tb`a L@JLD\, 3 @anrd`s K@@L>0 Cdatrg nd Dstunegs Cedatiecgs, @v. @rturg ]r`t 40>, C`seff` 0>95, Y`fneve`, Cbefd

D-j`ef? `revdr`Mcdcs.cf =.44j` 0 w`s glsdrvdn `t tbd hf`cedr irgat ldtwdda 0584 `an 0558.Hfgl`f pgsetegaeah systdj (H]S) n`t` wdrd usdn ea tbd `ccujuf`tega `rd` gi tbd hf`cedr tg eaidr `tbeaaeah r`td gi 0.5 =.0>j` 0 ldtwdda 0552 `an

8/7/2019 Ice-elevation changes of Glaciar Chico, southern Patagonia, using ASTER DEMs, aerial photographs and GPS data

2/8

bgrezgat f drrgr gi >3j. ^bd @S^D\ scdad w`s grtbg-rdcteiedn nureah tbd nehet`f dfdv`tega jgndf (NDJ) hdadr`-tega prgcdss, yedfneah ` bgrezgat`f drrgr 604 j.

Iedfn jd`surdjdatsSdvdr`f iedfn c`jp`ehas b`vd ldda c`rredn gut tg tbd`ccujuf`tega `rd` gi Hf`ce`r Cbecg seacd 0559, wbda tbdCbefd`a @er Igrcd ldh`a tbd sg-c`ffdn Bedfg @zuf `aau`fc`jp`ehas wbecb tr`ea pefgts tg pdrigrj sagw f`aneah `ant`kd-gii gi ^wea Gttdr `drgpf`ads dqueppdn wetb skes.

^bd ierst c`jp`eha w`s c`rredn gut ea tbd `ccujuf`tega`rd` gi Hf`ce`r Cbecg ea O`au`ry 0559, wbda ` 03 j jdt`f

j`st w`s luredn tg 3 j ea sagw `t tbd l`sd c`jp, fgc`tdn`t 0>>=j`.s.f. ga ` if`t `rd` wetb ` 0.> 2 suri`cd sfgpd,`pprgxej tdfy 0 kj agrtb gi tbd fgc`f ecd nevend ldtwddaHf`ce`rds Cbecg `an Yednj` (Ieh.

8/7/2019 Ice-elevation changes of Glaciar Chico, southern Patagonia, using ASTER DEMs, aerial photographs and GPS data

3/8

hdgfghec p`ttdras. ^re`ahuf`tega `an luanfd `noustjdat w`sc`fcuf`tdn igr d`cb jgndf, useah HC]s `an ted pgeats. Xetbtbes `noustdn jgndf et w`s pgsselfd tg c`fcuf`td tbd `lsgfutdgredat`tegas gi tbd daterd ej`hd lfgck. Gacd tbd ierst ej`hdlfgck w`s sgfvdn, tbd sdcgan `an tbern lfgcks wdrd `noustdntg d`cb gtbdr, useah ted pgeats glt`eadn sejuft`adgusfy irgj`ff tbd lfgcks. Xetb tbd rdsufteah gredatdn ej`hdry, tbdpbgtghr`jjdtrec sgitw`rd `utgj tec`ffy c`fcuf`tdn `a`lsgfutd NDJ igr d`cb n`td. @ 4= j pexdf sezd w`s cbgsdacgasendreah pgsselfd ndigrj`tegas nud tg tbd `dre`f-pbgtg-hr`pb sc`aaeah prgcdss, `s wdff `s gtbdr bgrezgat`f prgl-fdjs ndrevdn irgj hdgfgc`tega gi HC]s. ^bd NDJs cgvdrdn

j`eafy tbd `lf`tega `rd` gi tbd hf`cedr, wbdrd tbd stdrdg-j`tcbeah prgcdss w`s succdssiuf. ^bd sagw-cgvdrdn uppdrp`rts wdrd agt cgjpfdtdfy cgvdrdn, dspdce`ffy `rguan tbdj`st east`ffdn ea 0559, wbdrd tbd fgw cgatr`st ea tbd `dre`fpbgtghr`pb prdvdatdn `ay `ftetund eaigrj`tega irgj ldeahglt`eadn (Ieh. 3).

NDJ hdadr`tega irgj @S^D\L`sdn upga l`ans 3A `an 3L ej`hds irgj gad @S^D\ scdad`cquerdn ga 0> Gctgldr

8/7/2019 Ice-elevation changes of Glaciar Chico, southern Patagonia, using ASTER DEMs, aerial photographs and GPS data

4/8

D\\G\SBgrezgat`f drrgrs^bd rdsufteah bgrezgat`f rjs drrgrs igr tbd ej`hd rdcteiec`-tega, `an tbus tbd gvdr`ff pgsetega `ccur`cy gi tbd NDJshdadr`tdn irgj tbd `dre`f pbgtghr`pbs `an tbd @S^D\ej`hd, wdrd `utgj`tec`ffy c`fcuf`tdn ly Sgcdt Sdt `an ]CEHdgj`tec` cgjjdrce`f sgitw rd, yedfneah 0= `an 04 jrdspdctevdfy. ^bdsd bgrezgat`f drrgrs `rd nud tg tbd HC]sdjpfgydn ea tbd NDJ hdadr`tega prgcdss, `an tg pgsselfdndigrj tegas `itdr sc`aaeah tbd pbgtghr`pbs, drrgrs eaendateiyeah tbd HC]s ga tbd ej`hdry `an/gr ndigrj`tegasgi tbd `dre`f pbgtghr`pb dnhds.

^bd bgrezgat f drrgr gi tbd H]S n`t w`s c`fcuf tdn`utgj`tec`ffy useah Hdghdaeus cgjjdrce`f sgitw`rd, yedfn-eah ga `vdr`hd =.0= j igr pgeats jd surdn wetb hdgndtecqu`fety H]S rdcdevdrs, `an >.4 j igr pgeats jd`surdn wetbtgpghr`pbec qu`fety H]S rdcdevdrs. Ea grndr tg cgjp`rdtbdsd n t` wetb tbd prdvegus NDJs, tbd H]S n`t` wdrdtr`asigrjdn tg ` r`stdr igrj`t, wbdrd 4= j pexdf sezd NDJswdrd hdadr`tdn igr d`cb n`t`sdt.

Ydrtec`f drrgr gi H]S n`t`@ff tbd H]S jd`surdjdats wdrd c`rredn gut ea rdf`tevdfy if`t`rd`s `w`y irgj behb jguat`eas, wetb nest`acds ldtwddakeadj tec `an l`sd jd surdjdats ag fgahdr tb`a 0=kj.Tandr tbdsd cganetegas, `an cgasendreah gafy tbd fgwdst]rdcesega Grlet Ndtdrjea`tega (]GN) v`fuds, tbd rdsufteahvdrtec`f drrgrs wdrd 8 j igr jd`surdjdats l`sdn upgatgpghr`pbec qu`fety H]S rdcdevdrs `an ldttdr tb`a =.3=j igrhdgndtec qu`fety H]S rdcdevdrs.

Ydrtec`f drrgr igr `dre`f pbgtghr`pb NDJs^bd vdrtec`f drrgr glt`eadn igr tbd ej`hd rdcteiec`tega irgjHC]s, `an tbus tbd gvdr`ff vdrtec`f `ccur`cy gi tbd nehet`fpbgtghr`jjdtrec NDJ, w`s cgjputdn ly Sgcdt Sdt,yedfneah 9.= j igr d`cb gi tbd NDJs. Bgwdvdr, wbda rgck

^`lfd 0. Ydrtec`f `dre`f pbgtghr`pbs

Ifehbt a`jd Agjea`f sc`fd N`td Igc`f fdahtb ^ypd

jj

^\EJD^\GHGA 0 ?8= === 05>4 ( O`au`ry) 28.59 Ydrtec`fHdgtdc 0 ? 8= === 0558 (04 J`rcb) 043.3< Ydrtec`f

^`lfd ( an 4 O`au`ry) 0, > an 4

8/7/2019 Ice-elevation changes of Glaciar Chico, southern Patagonia, using ASTER DEMs, aerial photographs and GPS data

5/8

gutcrgps wdrd cgjp`rdn ldtwdda NDJs ndrevdn irgj `dre`fpbgtghr`pbs irgj neiidrdat dpgcbs, `a `vdr`hd st`an`rnndve`tega gi 0< j w`s glt`eadn, wetb le sds gi 0.>0.5 j.^bd drrgrs b`vd ` agrj`f nestrelutega. ^bd 0< j drrgr esrdf`tdn j`eafy tg tbd ea`ccur`ceds gi tbd HC]s glt`eadnirgj tbd rdhuf r c`rtghr`pby gi tbd Eastetutg HdghriecgJefet`r gi Cbefd, `an es cgjpresdn gi 2.4j drrgr igr d`cbseahfd NDJ (^`lfd >), wbecb es ea hggn `hrddjdat wetb tbdrdsuft glt`eadn `utgj`tec`ffy ly Sgcdt Sdt.

Ydrtec`f drrgr igr tbd @S^D\ NDJ^bd dfdv`tegas gi rgck gutcrgp `rd`s wdrd cgjp`rdnldtwdda tbd @S^D\ NDJ `an tbd `dre`f pbgtghr`pb NDJs,yedfneah ` jd`a le`s gi

8/7/2019 Ice-elevation changes of Glaciar Chico, southern Patagonia, using ASTER DEMs, aerial photographs and GPS data

6/8

dan gi tbd Sgutbdra Bdjespbdrd sujjdr (Idlru`ryJ`rcb)cgrrdspgans tg tbd DF@, wbecb es suppgrtdn ly tbd i`ct tb`ttdjpdr`td ecd cganetegas `an behb `ccujuf`tega prdv`efeah`t B]S (Sber`ew` `an gtbdrs,

8/7/2019 Ice-elevation changes of Glaciar Chico, southern Patagonia, using ASTER DEMs, aerial photographs and GPS data

7/8

tbd `lf`tega `rd` gi tbd hf`cedr `t 00==03j` 0 w`s glt`eadn. ^bdneiidrdacds prdsdatdn ` agrj`f nestrelutega, wetb ` jeaejujtbeaaeah r td gi 0.3 j ` 0 `an ` j`xejuj gi 0.5j` 0 .Cgasendreah 0< hdgndtec qu`fety r`penst`tec H]S jd`surd-jdats c`rredn gut `t tbd `ccujuf`tega `rd` gi tbd hf`cedrldtwdda 034=j `.s.f. ea 0552 `an j` 0 , wetb `r`ahd gi j ` 0 , `an ag `pp`rdat `ftetunea`f gr sp`te`fp`ttdra.

Gad gi tbd jd`surdn pgeats `t behbdr `ftetund ea tbdhf`cedr w`s tbd j`st east`ffdn `t 0>>=j`.s.f. ea O`au`ry0559 (Ieh.

8/7/2019 Ice-elevation changes of Glaciar Chico, southern Patagonia, using ASTER DEMs, aerial photographs and GPS data

8/8

f`an Ecd Jd`surdjdats irgj Sp`cd (HFEJS) `an tbd TSHSh`vd uardstrectdn `ccdss tg @S^D\ `an F`ans`t D^J+ej`hds. J. @aey` cgatrelutdn tbd F`ans`t ^J jgs`ec gi 0529. CDCS es ` Jeffdaaeuj Scedacd Eastetutd `an es iuandnea p`rt ly hr`ats irgj Djprds`s CJ]C, Iuan`cega @ands`an tbd eakdr Iguan`tega. ^bd cgjjdats gi tbd dnetgr\. A`rusd `an twg `agayjgus rdidrdds `rd `ckagwfdnhdn.

\DID\DACDS@aey`, J. 0555. \dcdat hf`cedr v`re`tegas gi tbd Bedfgs ]`t`hg ae-

cgs, Sgutb @jdrec`, `an tbder cgatrelutega tg sd`-fdvdf cb`ahd.@rct. @at`rct. @fp. \ds., 30(