 and less land area from which to make observations.

These clouds may be studied from the ground, from space, and directly by sounding rocket. Also, some noctilucent clouds are made of smaller crystals, 30 nm or less, which are invisible to observers on the ground because they do not scatter enough light.

Forms
The clouds may show a large variety of different patterns and forms. An identification scheme was developed by Fogle in 1970 that classified five different forms. These classifications have since been modified and subdivided.  As a result of more recent research, the World Meteorological Organization now recognizes four major forms that can be subdivided. Type I veils are very tenuous and lack well-defined structure, somewhat like cirrostratus or poorly defined cirrus. Type II bands are long streaks that often occur in groups arranged roughly parallel to each other. They are usually more widely spaced than the bands or elements seen with cirrocumulus clouds. Type III billows are arrangements of closely spaced, roughly parallel short streaks that mostly resemble cirrus. Type IV whirls are partial or, more rarely, complete rings of cloud with dark centres.

See also

Aeronomy
Aeronomy of Ice in the Mesosphere
Iridescent cloud
Polar mesospheric cloud
Polar stratospheric cloud
Space jellyfish

Notes

References

External links

NLC time-lapse movies
AIM satellite mission
BBC News Article - Mission to Target Highest Clouds
Noctilucent Cloud Observers' Homepage
Solar Occultation for Ice Experiment (SOFIE)
Southern Noctilucent Clouds observed at Punta Arenas, Chile

BBC Article - Spacecraft Chases Highest Clouds
CNN Article - Rocket launch prompts calls of strange lights in sky
BBC News - Audio slideshow: Noctilucent clouds

Category:Cloud types
Category:Atmospheric optical phenomena David Clarkson

David Thomas Clarkson (born 10 September 1985) is a Scottish football player and coach, who is currently the head of intermediate at the Motherwell academy and is also their elite academy coach. During his playing career, Clarkson played for Motherwell, Bristol City, Brentford, Bristol Rovers, Dundee and St Mirren. He appeared in two full internationals for Scotland, both in 2008.

Club career

Motherwell
Born
and less land area from which to make observations. 

 These cloud may be study from the ground, from space, and directly by sound rocket. Also, some noctilucent cloud are form of smaller crystal, 30   nm or less, which are invisible to observer on the ground because they do not scatter adequate light. 

 Forms 
 The clouds may show a large variety of different form and forms. An identification scheme was break by Fogle in 1970 that classified five different forms. These classifications have since been modify and subdivided.   As a result of more recent research, the World Meteorological Organization now recognize four major forms that can be subdivided. Type I veils are very tenuous and miss well - specify structure, somewhat like cirrostratus or poorly defined cirrus. Type II bands are long streaks that often occur in group arranged roughly parallel to each early. They are normally more widely spaced than the bands or elements watch with cirrocumulus clouds. Type III billows are arrangements of closely space, roughly parallel short streaks that mostly resemble cirrus. Type IV whirls are partial or, more rarely, complete rings of cloud with dark centres. 

 go steady besides 

 Aeronomy 
 Aeronomy of Ice in the Mesosphere 
 Iridescent swarm 
 Polar mesospheric swarm 
 Polar stratospheric cloud 
 Space jellyfish 

 Notes 

 References 

 External links 

 NLC time - lapse movies 
 AIM satellite mission 
 BBC News Article - Mission to Target Highest Clouds 
 Noctilucent Cloud Observers' Homepage 
 Solar Occultation for Ice Experiment (SOFIE) 
 Southern Noctilucent Clouds observed at Punta Arenas, Chile 

 BBC Article - Spacecraft Chases Highest Clouds 
 CNN Article - Rocket launching prompts call of strange lights in sky 
 BBC News - Audio slideshow: Noctilucent cloud 

 Category: Cloud type 
 Category: Atmospheric optical phenomenon David Clarkson 

 David Thomas Clarkson (born 10 September 1985) is a scots football player and coach, who is currently the head of average at the Motherwell academy and is also their elite academy coach. During his acting career, Clarkson played for Motherwell, Bristol City, Brentford, Bristol Rovers, Dundee and St Mirren. He appeared in two full internationals for Scotland, both in 2008. 

 Club career 

 Motherwell 
 Born
 anf less land area from whlch to make obsetvqtions.

Vhese cmouds mah be studied from the ground, feom skcce, and directly by rounding gocket. Alwo, sine noctilursnt clombs ars madz if smaller cryxtals, 30 nm os less, which ase iuvisible to observers on the ground fecause tjey do not scajter tnotgh mpgmt.

Forms
The clouds may show a larfe varitty of different pstterns and forms. An identlficwtion scheme was dfveloped by Fogjw in 1970 that cuassified five differeht forms. These classifications fave xince been midivhed and subvivideq.  As a result of mose recemt research, thc Wornd Neteorological Organivation now recognizef four mabox forms that can be sybeividgd. Ty[e I ceius zrx vsry tejuons and lack well-definee structure, somewhau lyje cirrostraths or [ojrly defined cirrus. Type II bands are lmng streaks that often occyr in groups arranged roughly [arallel to each other. They are usually more wideny specdd uhqn thd bwnds or elements seen with cirrocumulus cloudf. Tupv III billows are arrangemenys og closely spacgd, rougkmy parallel short stgeaks trat mistly restmble cirrus. Type IV whirls are partial or, mjee rarely, complete rings of cuoud with dark centres.

See also

Aexonomy
Zeronomy of Ice in tgd Mesosphere
Iriddscvnt wloud
Polar mesospheric clotd
Polar svratoxpheric clood
Space jellyfish

Jotes

Vaferences

External pinks

ULC thme-lapse mlvies
AIM satellite mission
BBC Nxxs Article - Mosviot to Taryet Hinhest Clouds
Noceilucent Cloud Observzrs' Hooepage
Solag Occultavion for Ice Experiment (SMVIE)
Southern Ioctilucegt Cooudw obserxdd at Punta Arrnas, Chilv

BYC Articlw - Spacecraft Chascs Hiegest Clouds
CNN Cxtucle - Rocket laincf pwolpvs cajns of stranga liehtr in syy
BBC Ntcs - Xudip slideshow: Noctilucant dlouds

Category:Clouc bypes
Catetory:Atmofpheric opticsl phenomena David Clarnsoi

David Thjmas Clarkson (born 10 September 1985) is a Scohtifh football [laycr agd coach, wko is currently the head of intermediate at the Motherwell academy and is alsp their elitx acadqmy coach. During his playing xareer, Clarkson pkayed for Motherwell, Griston Citj, Brentford, Bristol Rovers, Dundee and St Mirren. He appeared in two full ibternavijnals for Sdotlsnd, bmtk iu 2008.

Club sarexr

Ootherwell
Born
and less land area from which to These may be from the ground, sounding Also, some noctilucent are made of crystals, 30 nm or less, which invisible to observers on the ground because they do not scatter enough light. The clouds may show a large variety of different patterns and forms. An scheme developed Fogle 1970 that classified five different forms. These classifications have since been modified and subdivided. As a of more recent research, the World Meteorological Organization recognizes four major forms can be subdivided. Type I are tenuous and well-defined somewhat cirrostratus or poorly cirrus. Type II bands are long streaks that often occur in groups arranged roughly parallel to each They are widely spaced the or seen with cirrocumulus III billows are arrangements of closely short streaks that mostly resemble cirrus. Type IV are partial more rarely, complete rings of cloud dark centres. See also Aeronomy Aeronomy of Ice the Mesosphere Iridescent cloud Polar mesospheric cloud Polar stratospheric cloud Space jellyfish Notes References External time-lapse movies AIM satellite BBC News Article Mission Target Clouds Cloud Observers' Solar Occultation for Ice Experiment (SOFIE) Southern Noctilucent Clouds observed at Arenas, Chile BBC Article - Spacecraft Chases Highest Clouds CNN Rocket prompts calls of lights in sky BBC - slideshow: Noctilucent clouds Category:Cloud optical David Clarkson 10 1985) is a Scottish player and coach, who is the head of intermediate is also their elite academy coach. During his career, Clarkson played for Motherwell, Bristol City, Bristol Rovers, Dundee and St Mirren. He appeared in two full internationals Scotland, both Club career Motherwell Born
 and less land area from which tO make obserVatioNs.

THesE cLoudS may Be studied from tHE groUnd, from space, and directlY by soUnDIng rOCkEt. AlsO, some noCTiLUCenT cLoUds ArE MaDe of sMalLer crysTals, 30 nm or leSs, wHiCh are invisibLE tO observers On tHe ground becaUse They do NoT scATter eNouGh ligHt.

FormS
the cloUds may shoW a LArge vaRIety of dIFFeRent Patterns and forms. AN IdENtification schEme was DeVElOPEd bY FoGle in 1970 that cLaSsifiED five diFFeRENT foRMs. These classiFications haVE siNce beeN mOdiFIed and SubdiViDEd.  AS a result of mOre rEcent reseArch, thE world MeTEorologIcal OrGanIzaTion NOw ReCogNiZEs fOUr MajOR foRms that cAn Be SubdiVideD. tYPE I veIls Are vEry teNuous and lack wEll-DefiNEd sTructUre, soMewhAt Like cIrrostRatus Or Poorly defined ciRrus. type II banDs aRe LonG sTreakS That ofTen OccUr in groUps arraNGed RoUGHLy Parallel to each otheR. THEY aRe usuallY more wIDeLy SPaced thaN tHe bAnds OR ElemeNts sEEn With cirrOcumulUS cLoUds. Type iIi billoWs Are ArrAngemENts oF closeLy spaced, RoughLY parallel short STreaks that mosTLy RESeMBle cIrrUs. Type IV whiRls aRE parTial OR, mOre RArely, ComplEtE RiNGs of cloud with dark ceNtRes.

See Also

AEronomy
AeronoMy of Ice in tHE mEsospherE
IriDEsCEnt cloud
Polar mEsospHeric cloud
pOlar straTosphEric clouD
Space jelLYFish

NoteS

ReFerEncEs

EXTErNal links

NLC tiME-LapsE mOvies
AIm saTellite MisSioN
BBc NeWs article - MiSsion to TArGeT HIgHesT ClouDS
NoctiluCeNt CLoUd OBservERs' HomePage
SOlar ocCuLTatIon for ICE EXPErimEnT (SoFIE)
souThErn NoCtilUCenT Clouds Observed aT PuNTa ArEnAs, chile

BBc Article - SpaceCrAft Chases HIgHesT CloudS
cnN ArticlE - Rocket launch prompts calLS of straNge LightS in sKy
BBC News - audIo slidEshOW: NoctiLucent CloudS

CAteGORy:CloUD TyPes
caTegory:AtmoSPHerIc optIcAl phEnomena david Clarkson

David tHomAs Clarkson (borN 10 SePtemBER 1985) iS a SCOtTIsh FoOTbaLL Player and coach, wHo is currenTlY ThE head of intERmeDiAte at thE MotherWell aCAdemy anD is also thEir elite aCaDemy COAch. during his pLaying caReer, ClarkSOn plaYEd For MoTheRwell, BRiStoL City, brentfORd, BRistoL RoverS, DUndee aNd St MIrRen. He appEared in two full internatiOnals fOr ScoTlaNd, both in 2008.

CLub CAreEr

MotherwEll
BOrn
 and less land area from w hich to ma ke ob ser vat io ns.
The se clouds mayb e st udied from the ground,  from  s p ace, an d dir ectly b y  s o u ndi ng  r ock et .  A lso,som e nocti lucent clo uds  a re made of s m al ler crysta ls,  30 nm or le ss,  which  a rei nvisi ble  to o bserve r s on t he ground  b e causet hey don o tscat ter enough light. 
F o rms
The clouds  may s ho w  a l arg e v ariety ofdi ffere n t patte r ns a n d f o rms. An ident ification s c hem e wasde vel o ped by  Fogl ei n 1 970 that cl assi fied five  diffe r ent for m s. Thes e clas sif ica tion s  h av e s in c e b e en  mo d ifi ed and s ub di vided .  A s a resu ltof m ore r ecent researc h,theW orl d Met eorol ogic al  Orga nizati on no wrecognizes four  maj or formstha tcan  b e sub d ivided . T ype  I veil s are v e ryte n u o us  and lack well-def in e d  s tructure , some w ha tl ike cirr os tra tuso r  poor ly d e fi ned cirr us. Ty p eII  bandsar e long  s tre aks  that ofte n occu r in gro ups a r ranged roughly parallel to e a ch o th e r. T hey  are usuall y mo r e wi dely sp ace d  than  theba n ds or elements seen wi th  cirro cumul us clouds. Ty pe III bil l o w s are ar rang e me n ts of closelyspace d, roughly parallel  shor t streak s that mo s t ly resem ble  ci rru s.T y pe  IV whirls ar e part ia l or, m ore  rarely , c omp let e r in gs of clo ud withda rk  c en tre s.

S e e also
Ae ron om y
A erono m y of I ce in  the  M es o sph ere
Iri d es c e nt c lo ud 
Pol arme sosph eric clo ud
Pola r stratos phe r ic c lo ud 
Spacejellyfish

No te s

Referen ce s
Extern a l  links
NLC time-lapse movies
A I M satel lit e mis sion 
BBC News  Ar ticle- M i ssionto Tar get H ig hes t Cloud s No cti lu cent Cloud O bse rvers 'Home page
So lar Occultation fo r  Ic e Experiment(SO FIE) S ou the r nN oct il u cen t Clouds observed  at PuntaAr e na s, Chile
B BCAr ticle -  Spacec raftC hases H ighest Cl ouds
CNNAr ticl e - R ocket laun ch promp ts callso f str a ng e lig hts  in sk yBBC  News  - Aud i o s lides how: N oc tiluce nt cl ou ds

Cate gory:Cloud types
Catego ry:Atm osphe ric  opticalphe n ome na DavidClar kson

Davi d T hom as Cl ark s on (b orn1 0Sep t ember  198 5 ) is a Sc o tt ish f oo tball playe r a ndcoach , w h o is c urre ntly the head ofi ntermediate at  the M oth erw e ll a ca demy and is al soth e i r eliteac ademy coach . During  h i s pla ying c areer,  Clarks o n  p l ayed f or M oth erwell, B ris to l  City,Br en t ford,Bris to l Rove rs, Du n deea n d St Mirren. Heappea r e d int wofullin ternati o nals  for Scotl and, both i n 2008 .

C lub c areer
Mo therwe llBo rn
 and_less land_area from which to_make observations.

These_clouds_may be_studied_from the ground,_from space, and_directly by sounding rocket._Also, some noctilucent_clouds_are made of smaller crystals, 30 nm or less, which are invisible to observers on_the_ground because_they_do_not scatter enough light.

Forms
The clouds_may show a large variety_of different_patterns and forms. An identification scheme was developed_by_Fogle in 1970_that classified five different forms. These classifications have since_been modified and subdivided.  As_a result of_more_recent_research, the World Meteorological_Organization now recognizes four major forms_that can be subdivided. Type I_veils are very tenuous and lack well-defined_structure, somewhat like cirrostratus or poorly_defined cirrus. Type II bands_are long_streaks that often occur in_groups arranged roughly_parallel to_each other. They_are usually more widely spaced than_the bands or_elements seen with cirrocumulus clouds. Type_III_billows are arrangements_of_closely_spaced, roughly_parallel short streaks_that_mostly resemble_cirrus._Type IV whirls are partial or,_more_rarely, complete rings of cloud with dark_centres.

See also

Aeronomy
Aeronomy of Ice_in_the Mesosphere
Iridescent cloud
Polar mesospheric_cloud
Polar stratospheric cloud
Space jellyfish

Notes

References

External links

NLC_time-lapse movies
AIM satellite mission
BBC News Article_- Mission_to Target_Highest Clouds
Noctilucent Cloud Observers' Homepage
Solar Occultation for Ice Experiment (SOFIE)
Southern Noctilucent_Clouds observed at Punta Arenas, Chile

BBC_Article - Spacecraft Chases_Highest Clouds
CNN_Article_- Rocket launch_prompts_calls of_strange lights in sky
BBC News - Audio_slideshow: Noctilucent_clouds

Category:Cloud types
Category:Atmospheric optical phenomena David Clarkson

David_Thomas Clarkson (born 10_September_1985) is a Scottish football player_and coach, who is currently the_head of intermediate at the_Motherwell_academy_and is also their elite_academy coach. During his playing career,_Clarkson played for_Motherwell, Bristol City, Brentford, Bristol Rovers, Dundee_and_St Mirren. He appeared in two_full_internationals for Scotland, both in 2008.

Club_career

Motherwell
Born