Physical environment - In situ data - Surface salinity collected during the International Bottom Trawl Survey in 2007

Three environmental parameters were measured in situ during the IBTS in 2007. Temperature and salinity were measured using thermosalinometer 3 to 5 m under sea surface. Sub-surface (3-5 m) chlorophyll a concentration was measured using a fluorometer (measure the fluorescence emitted by the pigment). The IBTS survey, which takes place each year in January, gives a good illustration of winter conditions.2007年IBTS调查期间，对三项环境参数开展了原位测定。在海面下3至5米处，使用温盐计（thermosalinometer）测量海水温度与盐度；表层下3至5米的叶绿素a（chlorophyll a）浓度，则通过荧光计（fluorometer）测定（该仪器用于检测该色素所发射的荧光信号）。IBTS调查于每年1月开展，可较好地反映冬季海域的环境状况。