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楼主: 北落师门
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[北大西洋] 2011年6月北大西洋LPA(AL93)

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 楼主| 发表于 2011-6-3 10:42 | 显示全部楼层
9# sylar


预测进入东北太发展,东北太TC中绝大部分是源于西非和北大西洋的。那个llc是5月30日就出现了。
发表于 2011-6-3 10:44 | 显示全部楼层
是LLCC(低层水平环流中心),不是LLC,请不要缺省缩写
 楼主| 发表于 2011-6-3 10:54 | 显示全部楼层
12# li0627
底层环流就是llc,NOAA就是用llc的,美军才会用底层环流中心,llcc呢。国际学术上llc是底层环流,llcc是底层环流中心。用llc更妥当。因为这里是建立底层环流,所以必须用llc,llcc是不能说建立的,因为llc可完整,可不完整,llc不完整时,用不能说llcc建立了。llc是环流,llcc是个点。
 楼主| 发表于 2011-6-3 11:29 | 显示全部楼层
AN AIR FORCE RESERVE RECONNAISSANCE AIRCRAFT INVESTIGATING THE AREA
OF DISTURBED WEATHER ABOUT 350 MILES NORTH OF SAN JUAN PUERTO RICO
FOUND A SURFACE TROUGH OF LOW PRESSURE BUT DID NOT FIND A CLOSED   
CIRCULATION.  HOWEVER...THE AIRCRAFT DID REPORT GALE-FORCE WINDS IN   
THE AREA.  UPPER-LEVEL WINDS ARE FORECAST TO BECOME MORE CONDUCIVE
FOR DEVELOPMENT...AND THIS SYSTEM HAS THE POTENTIAL TO BECOME A  
TROPICAL STORM AT ANY TIME AS IT CONTINUES MOVING WEST-NORTHWESTWARD   
AROUND 20 MPH.  THERE IS A HIGH CHANCE...GREATER THAN 50 PERCENT
OF TROPICAL CYCLONE FORMATION DURING THE NEXT 48 HOURS.  INTERESTS  
IN THE BAHAMAS SHOULD MONITOR THE PROGRESS OF THIS SYSTEM.
可看下,建立底层环流,合适的用词就是llc。不完整的llc多着呢,有了完整llc,才会有llcc。
 楼主| 发表于 2011-6-3 11:37 | 显示全部楼层
TXXS26 KNES 252126


A.  24S (SEAN)

B.  25/2030Z

C.  18.2S

D.  108.4E

E.  THREE/MTSAT

F.  TOO WEAK

G.  IR/EIR

H.  REMARKS...SEAN STILL HAS A WELL DEFINED LOW LEVEL CIRCULATION BUT
IS VOID OF ANY CONVECTION. THIS WILL BE THE FINAL BULLETIN ISSUED ON
THIS SYSTEM UNLESS REGENERATION OCCURS.

I.  ADDL POSITIONS

    NIL


...RUMINSKI
LOW LEVEL CIRCULATION缩写就是llc。
发表于 2011-6-3 12:47 | 显示全部楼层
LOW LEVEL CIRCULATION也该是低层水平环流吧,哪里来的“底层”
      
低对应高,LLC对ULC,一直没想清楚为什么老是有人说“底层”,底层的话都是海平面了
 楼主| 发表于 2011-6-3 13:04 | 显示全部楼层
TC的最低层的确延伸到海平面的呀。否则就不会以海平面风速作为评价TC强度的定义。只是气旋性曲率积云不在海平面,TC的风场是延伸到海平面的。也就需完整风场,NOAA的实测也是这么做的。并不是测气旋性曲率积云。
 楼主| 发表于 2011-6-3 13:08 | 显示全部楼层
THE CENTER OR WAVE AXIS OF ANA PASSED OVER BUOY 42060 AROUND 
0830Z...AND IF A CENTER EXISTED AT THAT TIME IT WAS SOUTH OF THE
BUOY.  THERE WAS ONE SHIP REPORT WITH A LIGHT WEST WIND AT 12Z.
SINCE THAT TIME...NEW CONVECTION WITH A MID-LEVEL SPIN HAS
DEVELOPED NEAR THE SOUTHEAST COAST OF PUERTO RICO. GIVEN THESE
HINTS...WE WILL CONTINUE ADVISORIES AT LEAST UNTIL A RECONNAISSANCE
AIRCRAFT INVESTIGATES ANA THIS AFTERNOON.
 楼主| 发表于 2011-6-3 13:10 | 显示全部楼层
AN AIR FORCE RECONNAISSANCE AIRCRAFT INVESTIGATED ANA THIS AFTERNOON  
AND DID NOT FIND A CLOSED WIND CIRCULATION. CONSEQUENTLY...ANA IS
NO LONGER A TROPICAL CYCLONE AND THIS WILL BE THE LAST ADVISORY ON
THIS SYSTEM UNLESS REGENERATION OCCURS.
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