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Flashcards in Wx/CRM Deck (24):
1

TAG

Trans-Cockpit Authority Gradient

if the TAG is appropriate, free communication among the crew can be maintained, improving the flight as well as monitoring of the aircraft.

the authority gradient should have a gentle slope towards the capt

2

ANA decision making process RADAR

R Recognise
A Analyse
D Develop and decide
A Action
R Review

3

Types of threats

Environment
ATC
Aircraft
Crew Support
Operational
Cabin

4

how can windshear be detected

TS near airport
difference in upper air temp of 5 deg or more after a front passes though or when movement spd is 30kts or more
large variations in wind direction and speed
blowing dust or similar phenomenon

5

Name 4 Japan main islands

Hokkaido
Honshu
Shikoku
Kyushu
N to S approx 3000km

6

On the pacific side

the summers are hot and humid with prevailing seasonal winds from the southeast.
the winters are dry and marked by many clear days

7

on the Sea of Japan side

northwesterly winter winds off the asian continent bring regular, heavy snows that make this one of the snowiest regions on earth.

8

hot and humid rainy season

all areas except the northern-most island of Hokkaido have the (bai-u) that lasts from early May to late July.

9

the typhoon season

between june and october, the southwestern part of the archipelago

10

siberian air mass H

pushes out towards the Pacific over Japan in winter (Dec-Feb) NW winds

high in the west, low in the east (seiko-toutei) winter pressure pattern

the winds dump their snow due to the mountains and run out of energy leaving the other side of the mountains with clear skies

11

okhotsk sea air mass

appears in the rainy season (May-July)
okhotsk is the name of the sea N of Hokkaido

warm S wind from Ogasawara H and cool N wind from Okhotsk H

the stronger Ogasawara pushes the Bai-u front northward to end the rainy season

12

ogasawara air mass

usually observed over the Japanese islands during summer JUNE JULY AUGUST
means the name of a group of island, in the pacific

H from Pacific. Hot moist air streams from SE to NW to fill low press areas over siberia
air mass thunderstorms
orographic TS
sea fog

13

yosuko air mass H

passes east over Japan in spring and autumn
means the name of a river in china

MAR APR MAY
spring storm by low pressure develops over Sea of Japan
May be strong SW wind, bumpy conditions and xwc RJAA

The fall Sept to Oct
polar front moves from N to S and can affect where typhoons are and storms

14

equatorial air mass

rare
extremely warm and has a high moisture content
Jun-Oct

15

determination of rain vs snow

need -30 deg on 500hPa
-6 deg on 850 hPa
ground temp of 2-3 degs

16

jetstream

polar jets 30 deg N and 60 deg N 23-39000
subtropical jet close to 30 deg N 33-52000

upper level jet moves northward during summer, or late spring and summer, southward during cold season, or autumn or winter

17

Cherry blossoms

In Tokyo late in March or early in April

18

Nihonkai Low

strong southerlies in late winter, early spring
shows end of winter
The first is called 'Haru-Ichiban' the first storm of spring

19

BECMG

gradual change over a certain threshold.
normally over 2 hours max 4 hrs

20

WS

observed 1600' or below in last 30 mins

21

what is a typhoon

TC in the W Pacific
end of summer August to October main season
bring torrential rain over wide areas and can cause severe disaster
approx 10 come close to Japan per yr with 3 making landfall

typhoon path - follows ridge of Osagawara high
winds over 100kts
rain over 300mm in 24hrs

22

Japan typhoon wind speeds

In Japan > 34kts
internationally > 64kts

23

dangerous part of typhoon

the right side of the typhoon, looking in the direction it is moving, has the higher wind speeds

24

Shurin season

typhoon season
more rain than Bai-u but over shorter period
in autumn