Link to SeaSoar CTD Data from R/V Wecoma cruise W0005A in the Northeast Pacific in 2000 as part of the U.S. GLOBEC program (NEP project)
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<pre>
W0005 R/V Wecoma 29 May - 17 June 2000
SeaSoar data from the U.S. GLOBEC Northeast Pacific Program
are available from the SeaSoar Web Site
at Oregon State University
Contact Jack Barth at OSU (Phone: 541-737-1607; email barth@oce.orst.edu)
SeaSoar data are available in two formats:
\"1Hz data\" or \"gridded\".
Each of these is described below.
1Hz Data
--------
The *.dat2c files give final 1Hz SeaSoar CTD data.
Here is the first line of inshore.line1.dat2c:
44.64954 -125.25666 108.7 8.6551 33.5239 26.0164 8.6439 26.0181 155.64019
000603152152 0001 0.069 0.288 0.476 0.23
The format of the *.dat2c files is given by:
col 1: latitude (decimal degrees)
col 2: longitude (decimal degrees)
col 3: pressure (dbars)
col 4: temperature (C)
col 5: salinity (psu)
col 6: Sigma-t (kg/cubic meter)
col 7: potential temperature (C)
col 8: sigma-theta (kg/cubic meter)
col 9: time (decimal year-day of 2000)
col 10: date and time (integer year, month, day, hour, minute, second)
col 11: flag
col 12: PAR (volts)
col 13: FPK010 FL (violet filter) (volts)
col 14: FPK016 FL (green filter) (volts)
col 15: chlorophyl-a (micro g/liter)
The ones place of the flags variable indicates which of the
two sensor pairs was selected as the preferred sensor, giving
the values for T, S, and sigma-t:
0 indicates use of sensor pair 1 (T1, C1)
1 indicates use of sensor pair 2 (T2, C2)
Voltage values (columns 12 - 14) are in the range of 0-5 volts.
A value of 9.999 indicates \"no value\" for those columns
Chlorophyll was calculated based on the voltage values of
the green filtered FPK016; if that FPAK was 9-filled, then the
chlorophyll value was set at 999.99; if the calibrated value
was negative (due to noise in the calibration) the chlorophyll
value was set at 0.00; otherwise the calibration equation
used was:
chl_a = 7.6727(volts) - 3.4208
Gridded Data
------------
The *1.25km files give the final SeaSoar CTD data gridded
at a spacing of 1.25 km in the horizontal, and 2 db in the
vertical. In general this was used for the mapping surveys
that were on the continental shelf.
The *2.5km files give the final SeaSoar CTD data gridded at
a spacing of 2.5 km in the horizontal (and 2 db in the
vertical). These were used for the deeper, offshore survey.
Here is the first line of inshore.line1.1.25km:
6.25 155.92008 44.651726 -124.13853 1.0 9 9.5228777
33.127800 25.569221 240.63866 9.5227690
0.24063867E-01 3.7872221 1.1320001 0.78988892
The format of the *km files is given by:
col 1 = distance (km)
col 2 = julian day + fractional day (noon, Jan 1 = 1.5)
col 3 = latitude (decimal degrees)
col 4 = longitude (decimal degress)
col 5 = pressure (dbar)
col 6 = count
col 7 = temperature (degrees C)
col 8 = salinity (psu)
col 9 = density (sigma-t) (kg/cubic meter)
col 10 = specific vol anomaly (1.0E-8 cubic meter/kg)
col 11 = potential temperature (degrees C)
col 12 = dynamic height (dynamic meters)
col 13 = PAR (volts)
col 14 = FPK010 (volts) (violet filter)
col 15 = FPK016 (volts) (green filter)
\"missing data\" was set at 1.0e35
columns 1 - 4 give the average location and time of the
values contained in the column at that location. The
column gives values for every two dbars of depth, starting at
1db and extending down to a value at 121 db. The column
then shifts to the next location, 1.25km further along the
line. If we are working with the 2.5km sections, then the column
goes down to a value of 329 db, and the next column then shifts
2.5km further along the line.
For the E-W lines, column 1 gives the distance from the coastline;
for the N-S lines, column 1 gives the distance from southernmost point.
column 6 (count) gives the number of samples in that 2db bin
</pre>
W0005 科考船Wecoma,2000年5月29日至6月17日
美国全球海洋生态系统动力学计划(U.S. GLOBEC)东北太平洋项目的SeaSoar数据,可从俄勒冈州立大学的SeaSoar网站获取。
联系人:俄勒冈州立大学Jack Barth,电话:541-737-1607;邮箱:barth@oce.orst.edu
SeaSoar数据提供两种格式:
"1Hz数据" 或 "网格化数据"。
以下分别对两种格式进行说明。
1Hz 数据
--------
*.dat2c 文件包含最终的1Hz SeaSoar温盐深(CTD)数据。
以下为inshore.line1.dat2c的第一行示例:
44.64954 -125.25666 108.7 8.6551 33.5239 26.0164 8.6439 26.0181 155.64019
000603152152 0001 0.069 0.288 0.476 0.23
*.dat2c 文件的格式定义如下:
列 1: 纬度(十进制度)
列 2: 经度(十进制度)
列 3: 压力(分巴)
列 4: 温度(℃)
列 5: 盐度(实用盐度单位,psu)
列 6: 密度距平Sigma-t(kg/m³)
列 7: 位温(℃)
列 8: 密度距平sigma-theta(kg/m³)
列 9: 时间(2000年的十进制年日)
列10: 日期与时间(整数格式:年、月、日、时、分、秒)
列11: 质量标记
列12: 光合有效辐射(PAR,伏特)
列13: FPK010 紫光滤波通道荧光信号(伏特)
列14: FPK016 绿光滤波通道荧光信号(伏特)
列15: 叶绿素a浓度(μg/L)
质量标记变量的个位数值用于标识优先选用的传感器对,以确定温度、盐度及Sigma-t的观测值:
0 表示选用传感器对1(T1、C1)
1 表示选用传感器对2(T2、C2)
列12至列14的电压值取值范围为0~5伏特,若取值为9.999,则代表该列无有效数据。
叶绿素a浓度通过绿光滤波通道FPK016的电压值计算得到:若该传感器的数值为9填充值(即9.999),则叶绿素a浓度设为999.99;若校准后数值为负(因校准噪声导致),则叶绿素a浓度设为0.00;否则采用以下校准公式:
chl_a = 7.6727×(电压值) - 3.4208
网格化数据
------------
*1.25km 文件为最终网格化的SeaSoar温盐深(CTD)数据,水平格距为1.25千米,垂直格距为2分巴,通常用于大陆架区域的测绘调查。
*2.5km 文件为最终网格化的SeaSoar温盐深(CTD)数据,水平格距为2.5千米(垂直格距为2分巴),适用于深海远海调查。
以下为inshore.line1.1.25km的第一行示例:
6.25 155.92008 44.651726 -124.13853 1.0 9 9.5228777
33.127800 25.569221 240.63866 9.5227690
0.24063867E-01 3.7872221 1.1320001 0.78988892
*km 文件的格式定义如下:
列 1 = 距离(km)
列 2 = 儒略日+小数日(1月1日正午为1.5)
列 3 = 纬度(十进制度)
列 4 = 经度(十进制度)
列 5 = 压力(分巴)
列 6 = 样本计数
列 7 = 温度(℃)
列 8 = 盐度(psu)
列 9 = 密度(Sigma-t,kg/m³)
列10 = 比容异常(1.0×10^-8 m³/kg)
列11 = 位温(℃)
列12 = 动力高度(动力米)
列13 = 光合有效辐射(PAR,伏特)
列14 = FPK010(伏特,紫光滤波)
列15 = FPK016(伏特,绿光滤波)
数据缺失标记为1.0e35。
列1至列4代表该格点数据的平均位置与时间。每列数据对应每2分巴的深度层,起始于1分巴,延伸至121分巴深度,随后沿测线移动1.25千米至下一个格点。若使用2.5km格距的数据,则深度层延伸至329分巴,格点沿测线移动2.5千米。
对于东西向测线,列1的值代表距海岸线的距离;对于南北向测线,列1的值代表距测线最南端点的距离。
列6(样本计数)代表该2分巴深度层内的有效样本数量。
创建时间:
2021-12-05



