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Variations of Southern South China Sea Characteristics near Pahang (Perubahan
Ciri Laut China Selatan Bahagian Selatan Berdekatan Pahang)
NUR HIDAYAH ROSELI1*
& MOHD FADZIL MOHD AKHIR2
1School of Marine Science and Environment,
Universiti Malaysia Terengganu
21030 Kuala Terengganu, Terengganu, Malaysia
2Institute of Oceanography and
Environment, Universiti Malaysia Terengganu
21030
Kuala Terengganu, Terengganu, Malaysia
Diserahkan:
2 April 2013/Diterima: 31 Januari 2014
ABSTRACT
Oceanographic cruises
in Pahang water in October 2003 and April 2004, monsoon transition months,
produce data on water characteristics. The temperature in both months showed
higher values in nearshore compared to the offshore stations. The near shore
salinity in both months is lower than offshore stations. Comparatively, there
were smaller differences in temperature and salinity in October than in April,
with very little variation between nearshore and offshore stations. T-S diagram
showed significant differences between October and April water characteristics.
According to the water characteristic observations, the temperature and
salinity in October was lower than in April, while dissolved oxygen was higher
than in April. The lower temperature and salinity taken during the sampling
time in October suggested that during this time, the study area already
received the influences of strong winds due to upcoming monsoon. The warmer and
saltier water obtained in April showed that during this time, the study area
was influenced by southwest monsoon. Winds related to rainfall were observed to
have impact to the dynamics of water characteristics during both months.
Keywords: Current
circulation; monsoon transition month; salinity; South China Sea; temperature
ABSTRAK
Pelayaran oseanografi
di kawasan perairan Pahang pada bulan Oktober 2003 dan April 2004, bulan
peralihan monsun, menghasilkan data mengenai ciri air. Suhu air pada kedua-dua
bulan menunjukkan nilai yang lebih tinggi di kawasan pesisir pantai berbanding
dengan stesen luar pesisir. Kemasinan di kawasan pesisir pantai pula adalah
lebih rendah daripada stesen luar pesisir bagi kedua-dua bulan. Secara
perbandingan, terdapat perbezaan kecil dalam suhu dan kemasinan pada bulan
Oktober berbanding bulan April, dengan perubahan yang sangat sedikit di antara
stesen berhampiran pantai dan luar pesisir. Gambarajah TS menunjukkan
perbezaan yang signifikan antara ciri air pada bulan Oktober dan April. Menurut
pemerhatian ciri air, suhu dan kemasinan pada bulan Oktober adalah lebih rendah
berbanding pada bulan April, manakala oksigen terlarut adalah lebih tinggi
berbanding pada bulan April. Suhu air laut dan kemasinan yang lebih rendah yang
diambil pada bulan Oktober memperlihatkan bahawa pada masa ini, kawasan kajian
telah menerima pengaruh angin kuat berikutan monsun yang bakal tiba. Suhu laut
yang semakin panas dan masin yang diperoleh pada bulan April menunjukkan bahawa
pada masa ini, kawasan kajian telah dipengaruhi oleh monsun barat daya. Angin
yang turut berkaitan dengan hujan diperhatikan memberi kesan kepada ciri dinamik
air pada kedua-dua bulan
Kata kunci: Bulan peralihan monsun; kemasinan; Laut Cina Selatan;
peredaran arus; suhu
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*Pengarang untuk surat-menyurat; email: nurhidayahroseli@gmail.com
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