HKO READINGS & RADIATION LEVEL

YESTERDAY'S WEATHER AND RADIATION LEVEL:
------------------------------------------------------
 
HONG KONG OBSERVATORY
MAXIMUM AIR TEMPERATURE                       20.1 C
MINIMUM AIR TEMPERATURE                       13.1 C
GRASS MINIMUM TEMPERATURE                     11.5 C
RELATIVE HUMIDITY                          47 - 79 PERCENT
RAINFALL                                         0 MM
TOTAL RAINFALL SINCE 1ST JANUARY              12.7 MM
AGAINST AN AVERAGE OF                         48.9 MM
 
OTHER STATIONS                MIN                  MAX
KING'S PARK                  11.7 C               19.7 C
WONG CHUK HANG               12.1 C               19.4 C
TA KWU LING                  NO DATA             NO DATA
LAU FAU SHAN                 10.2 C               19.0 C
TAI PO                       10.5 C               20.5 C
SHA TIN                      9.5 C               20.4 C
TUEN MUN                     11.1 C               21.2 C
TSEUNG KWAN O                NO DATA             NO DATA
SAI KUNG                     12.0 C               17.6 C
CHEUNG CHAU                  12.8 C               19.2 C
CHEK LAP KOK                 12.5 C               20.2 C
TSING YI                     11.3 C               21.3 C
SHEK KONG                    8.5 C               22.7 C
TSUEN WAN HO KOON            9.7 C               20.5 C
TSUEN WAN SHING MUN VALLEY   9.4 C               22.1 C
HONG KONG PARK               11.9 C               20.3 C
SHAU KEI WAN                 12.2 C               17.9 C
KOWLOON CITY                 12.2 C               21.1 C
HAPPY VALLEY                 11.2 C               20.5 C
WONG TAI SIN                 12.2 C               20.4 C
STANLEY                      13.3 C               17.2 C
KWUN TONG                    12.7 C               19.0 C
SHAM SHUI PO                 11.8 C               21.5 C
KAI TAK RUNWAY PARK          13.8 C               18.0 C
YUEN LONG PARK               8.6 C               21.9 C
TAI MEI TUK                  11.7 C               21.0 C
 
DURATION OF SUNSHINE (KING'S PARK):             10.5 H
 
THE MEAN UV INDEX RECORDED AT KING'S PARK YESTERDAY WAS 3,
THE UV INTENSITY WAS MODERATE.
THE MAXIMUM UV INDEX FOR YESTERDAY WAS 6.
SEA SURFACE TEMPERATURE (WAGLAN ISLAND):        17.5 C
 
YESTERDAY'S (13 FEB 2017) AVERAGE AMBIENT GAMMA RADIATION
DOSE RATE TAKEN OUTDOORS IN HONG KONG RANGED FROM 0.08 TO
0.15 MICROSIEVERT PER HOUR.  THESE ARE WITHIN THE NORMAL
RANGE OF FLUCTUATION OF THE BACKGROUND RADIATION LEVEL IN
HONG KONG (SEE NOTE). THE AVERAGE DOSE RATES MEASURED AT
THE RADIATION MONITORING STATIONS OVER VARIOUS PARTS OF THE
TERRITORY WERE AS FOLLOWS :
 
STATION                     YESTERDAY'S AVERAGE
                            (MICROSIEVERT/HOUR)
PING CHAU                           0.08
TAP MUN                             0.09
KAT O                               0.10
YUEN NG FAN                         0.12
TAI MEI TUK                         0.12
SHA TAU KOK                         0.10
KWUN TONG                           0.12
SAI WAN HO                          0.09
KING'S PARK                         0.14
TSIM BEI TSUI                       0.13
CAPE D'AGUILAR                      0.13
CHEK LAP KOK                        0.15

 
NOTE
1.     FROM READINGS TAKEN AT VARIOUS LOCATIONS IN HONG KONG DURING
       THE PERIOD 1987-2016, THE BACKGROUND AMBIENT GAMMA RADIATION
       LEVELS MAY VARY BETWEEN 0.06 AND 0.30 MICROSIEVERT PER HOUR.
 
2.     THE EXTENT OF HEALTH EFFECTS TO A PERSON AS A RESULT OF
       EXPOSURE TO RADIATION IS EXPRESSED BY A PHYSICAL QUANTITY
       CALLED EQUIVALENT DOSE, IN UNIT OF SIEVERT.  PROTECTIVE
       ACTION MAY BE REQUIRED IF THERE IS AN INCREASE IN THE
       AMBIENT GAMMA DOSE RATE ABOVE BACKGROUND SUCH THAT THE TOTAL
       ADDITIONAL DOSE IS EXPECTED TO EXCEED 5000 MICROSIEVERTS IN
       A RELATIVELY SHORT PERIOD OF TIME. FOR EXAMPLE, A DOSE OF
       5000 MICROSIEVERTS MAY BE REACHED WHEN THE AMBIENT GAMMA
       DOSE RATE IS 1000 MICROSIEVERTS PER HOUR (SEVERAL THOUSAND
       TIMES ABOVE BACKGROUND) AND LASTS FOR 5 HOURS.
 
3.     THE READINGS OF AMBIENT GAMMA RADIATION LEVEL FROM
       INSTRUMENT ARE EXPRESSED IN UNIT OF GRAY, WHICH IS
       NUMERICALLY EQUAL TO THE GAMMA DOSE EXPRESSED IN SIEVERT.

DISPATCHED BY HONG KONG OBSERVATORY AT 00:15 HKT ON 14.02.2017