OCEANOGRAPHY 7,' School of " "ev OREGON STATE UNIVERSITY

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1 School of " "ev OCEANOGRAPHY 7,' Moored Temperature Observations hi JASIN by L. M. dewitt, J. Bottero, W. V. Burt C. A. Paulson, and J. Simpkins Office of Naval Research N C-0067 N C-0004 NR OREGON STATE UNIVERSITY Data Report 83 Reference August 1980 Reproduction in whole or in part is permitted for any purpose of the United States Government

2 Unclassified SECURITY CLASSIFICATION OF THIS PAGE (When De,:t. Entered) REPORT DOCUMENTATION PAGE 1 REPORT NUMBER READ INSTRUCTIONS BEFORE COMPLETING FORM 2. GOVT ACCESSION NO. 3. RECIPIENT'S CATALOG NUMBER 4. TITLE (end Subtitle) Moored Temperature Observations in JASIN 7. AU THOR(s) L. M. dewitt, J. Bottero, W. V. Burt, C. A. Paulson and J. Simpkins 5. TYPE OF REPORT & PERIOD COVERED data report 6. PERFORMING ORG. REPORT NUMBER Data Report No CONTRACT OR GRANT NUMBER(e) N C-0067 N C PERFORMING ORGANIZATION NAME AND ADDRESS School of Oceanography Oregon State University Corvallis. Oregon CONTROLLING OFFICE NAME AND ADDRESS W. PROGRAM ELEMENT, PROJECT, TASK AREA & WORK UNIT NUMBERS NR REPORT DATE Office of Naval Research August 1980 Ocean Science and Technology Division 13. NUMBER OF PAGES Arlington, VA MONITORING AGENCY NAME & ADDRESS(if different from Controlling Office) 15. SECURITY CLASS. (of this report) 16. DISTRIBUTION STATEMENT (of this Report) Approved for public release, distribution unlimited Unclassified 195. DECLASSIFICATION/DOWNGRADING SCHEDULE 17. DISTRIBUTION STATEMENT (of the abstract entered in Block 20, if different from Report) Is. SUPPLEMENTARY NOTES 19. KEY WORDS (Continue on reverse side if necessary and identify by block number) Moored Thermistor Chain Time-Depth Sections of Temperature Upper Ocean Temperature Joint Air-Sea Interaction Experiment (JASIN) 20. ABSTRACT (Continue on reverse side if necessary and identify Moored temperature observations were obtained at an array of buoys in the North Atlantic ( 'N, ' 'W) during the Joint Air-Sea Interaction Experiment (JASIN) of Observations were taken at 10-minute intervals by use of thermistors at 21 depths ranging from 4.5 m to 81.5 m. Plots of presented for three moorings for by block number) temperature as a function of time are the period July 28 through September 6, DD" JAN 73 EDITION OF 1 NOV 65 IS OBSOLETE S/N ' Unclassified SECURITY CLASSIFICATION OF THIS PAGE (When Data Entered)

3 SECURITY CLASSIFICATION OF THIS PAGE(Whon Data Entered)

4 MOORED TEMPERATURE OBSERVATIONS IN JASIN by L. M. dewitt, J. Bottero, W. V. Burt C. A. Paulson and J. Simpkins School of Oceanography Oregon State University Corvallis, Oregon DATA REPORT Office of Naval Research Contract N C-0067 and N C-0004 Project NR Approved for public release, distribution unlimited Data Report 83 Reference G. Ross Heath Dean August 1980

5 TABLE OF CONTENTS ACKNOWLEDGMENTS INTRODUCTION INSTRUMENTATION OBSERVATIONS REFERENCES APPENDICES A. Location of Buoys B. Periods of Operation of Sensors C. Temperature Observations at B1 D. Temperature Observations at B2 E. Temperature Observations at B

6 ACKNOWLEDGMENTS We gratefully acknowledge the cooperation of the officers, crew and scientists aboard the R/V ATLANTIS II, David F. Casiles, commanding and Melbourne G. Briscoe, Chief Scientist. Special thanks go to personnel from the Woods Hole Buoy Group for their aid in deployment and retrieval of the moorings. This research was supported by the Office of Naval Research through contracts N C-0067 and N C-0004 under project NR

7 INTRODUCTION This report presents moored temperature observations obtained at three buoys during the Joint Air-Sea Interaction Experiment (JASIN) of July through September Details of the JASIN project can be found in reports of the Royal Society (1977, 1978) and in a paper by Pollard (1978). In the present study, temperature was recorded at 10-minute intervals at depths ranging from 4.5 m to 81.5 m. Sea surface temperature and atmospheric conditions were also recorded at each buoy but will not be presented in this report. For a discussion and analysis of these observations, see Ishida (1980). Temperature observations using a towed thermistor chain have been obtained by Baumann et al. (1980) in the same general area as the moorings. INSTRUMENTATION The location of the four moorings B1 through B4 is given in Appendix A. The moorings each included two Aanderaa recorders and thermistor chains. At moorings B2, B3 and B4, eleven thermistors on shallow chains measured water temperature at vertical separations of 3 m from a depth of 5.5 m to 35.5 m. A loop in the cable at mooring Bl caused the shallow chain at this mooring to be 1 m more shallow than at the other three, so observations there were at vertical separations of 3 m from 4.5 to 34.5 m. The deep thermistor chain at all four moorings measured water temperature at 10 locations separated by intervals of 5 m from a depth of 36.5 to 81.5 m. The eleventh channel on the deeper chains was used to record pressure, but because of an apparent sensor malfunction, pressure observations have not been included in this report.

8 2 OBSERVATIONS The starting time and length of operation of each thermistor is given for buoys Bl, B2, and 84 in Appendix B. Observations from buoy B3 were extremely noisy and have been excluded from this report. Temperature observations for the remaining three moorings as a function of time are given in Appendix C. In general, the temperature plot from a given sensor was terminated at the point in time where it appeared to fail. In some cases, however, the exact location of the cutoff point was difficult to determine because the sensor apparently began giving erroneous readings several hours or even days before it totally failed. One obvious example of this occurred at mooring Bl. The 4.5 m thermistor seemed well correlated with the lower sensors during the first six hours of its operation, but at about 0100 on August 2 higher frequency oscillations ceased. While the observations continued to follow the general trend of the lower sensors, inversions appeared that were probably not real. Even so, these observations give an approximate indication of surface temperature at Bl and have not been excluded from the plots. Other examples of this occurrence are of much shorter duration but in most cases are just as obvious. One other problem with the data is that except for a few instances, the data loggers would not record lower than a certain value which was approximately 8.9 C. This malfunction appeared most obviously in frequent sharp cutoffs of the lower two sensors in the last three weeks of data from mooring B4. (For example, see August 17). The problem also occurred occasionally at B2 when temperatures fell low enough. Temperatures at 81 never fell below 9.09 C and no such cutoffs appeared.

9 REFERENCES Baumann, R. J., C. A. Paulson and J. Wagner, 1980: Towed thermistor chain observations in JASIN. Report, Reference 80-14, School of Oceanography, Oregon State University, Corvallis, Oregon 97331, 202 pp. Ishida, H., 1980: Analysis of Meteorological Observations from an Array of Buoys during JASIN. Report, Reference 80-2, School of Oceanography, Oregon State University, Corvallis, Oregon 97331, 63 pp. Pollard, R. T., 1978: The Joint Air-Sea Interaction Experiment-JASIN Bull. Amer. Meteor. Soc., 59, Royal Society, 1977: Air-Sea Interaction Project, Scientific Plans for 1977 and London, 208 pp. Royal Society, 1978: Air-Sea Interaction Project, Operational Plans for 1978, London, 225 pp.

10 APPENDICES

11 APPENDIX A Location of Buoys

12 Location of Buoys Lat (N) Lon (W) B ' ' B ' ' B ' ' B ' '

13 APPENDIX B Depth versus the duration of operation of each sensor at buoys Bl, B2 and B4 are given on the following three pages.

14 , I JULY RUGUS T SEPTEMBER DURATION OF THERMISTORS DEPTH VS TIME MOORING B1

15 19 30 F- O so S JULY AUGUST SEPTEMBER DURATION OF THERMISTORS DEPTH VS TIME MOORING B2

16 / CT) Q Lit I- 40 LJJ Q- SO ^11111^ ^ I hit JULY AUGUST DURATION OF THERMISTORS DEPTH VS TIME MOORING B4 I I IIJI I SEPTEMBER

17 10 APPENDIX C Temperature Observations at Bl

18 MOORING BI TEMP VS TIME 1 RUG 78

19 MOORING Bi TEMP VS TIME 2 HUG

20 MOORING B1 TEMP VS TIME 3 PUG 78

21 MOORING B1 TEMP VS TIME 4 RUG 78

22 MOORING B1 TEMP VS TIME 5 AUG

23 MOORING B1 TEMP VS TIME 6 AUG 78

24 , ' 2000 MOORING B1 TEMP VS TIME 7 RUG 78

25 MOORING B1 TEMP VS TIME 8 RUG 78

26 MOORING B1 TEMP VS TIME 9 RUG 78'

27 MOORING B1 TEMP VS TIME 10 RUG 78

28 MOORING B1 TEMP VS TIME 11 AUG 78

29 MOORING B1 TEMP VS TIME 12 RUG 78

30 MOORING BI TEMP VS TIME 13 RUG

31 8r MOORING B1 TEMP VS TIME 14 RUG 78

32 MOORING B1 TEMP VS TIME 15 RUG 78

33 MOORING B1 TEMP VS TIME 16 AUG 78

34 MOORING B1 TEMP VS TIME 17 RUG 78

35 MOORING B1 TEMP VS TIME 18 RUG 78

36 MOORING B1 TEMP VS TIME 19 AUG 78

37 MOORING B1 TEMP VS TIME 20 RUG 78

38 1 8 i MOORING B1 TEMP VS TIME 21 RUG 78

39 MOORING B1 TEMP VS TIME 22 AUG 78

40 MOORING 81 TEMP VS TIME 23 RUG 78

41 MOORING B1 TEMP VS TIME 24 AUG 78

42 MOORING B1 TEMP VS TIME 25 AUG

43 MOORING B1 TEMP VS TIME 26 RUG 78

44 14 13 Li MOORING B1 TEMP VS TIME 27 RUG

45 MOORING B1 TEMP VS TIME 28 RUG

46 MOORING B1 TEMP VS TIME 29 RUG 78

47 8 I. I 1 i MOORING B1 TEMP VS TIME 30 RUG 78

48 MOORING B1 TEMP VS TIME 31 RUG 78

49 I MOORING B1 TEMP VS TIME 1 SEP 78.

50 MOORING B1 TEMP VS TIME 2 SEP 78

51 MOORING B1 TEMP VS TIME 3 SEP 78

52 MOORING B1 TEMP VS TIME 4 SEP 78

53 MOORING B1 TEMP VS TIME 5 SEP 78

54 ' MOORING B1 TEMP VS TIME 6 SEP 78

55 48 APPENDIX D Temperature Observations at B2

56 MOORING B2 TEMP VS TIME 29 JUL 78

57 I I, 1, 1 r MOORING 82 TEMP VS TIME 30 JUL 78

58 8 I I I I MOORING B2 TEMP VS TIME 31 JUL 78

59 MOORING B2 TEMP VS TIME 1 AUG 78

60 MOORING B2 TEMP VS TIME 2 RUG 78

61 MOORING B2 TEMP VS TIME 3 RUG 78

62 MOORING B2 TEMP VS TIME 4 RUG 78

63 MOORING B2 TEMP VS TIME 5 RUG 78

64 L( MOORING B2 TEMP VS TIME 6 AUG

65 MOORING B2 TEMP VS TIME 7 RUG 78

66

67 MOORING B2 TEMP VS TIME 9 AUG 78

68 MOORING B2 TEMP VS TIME 10 RUG 78

69 MOORING B2 TEMP VS TIME 11 AUG 78

70 MOORING B2 TEMP VS TIME 12 AUG 78

71 MOORING B2 TEMP VS TIME 13 AUG 78

72 MOORING B2 TEMP VS TIME 14 PUG

73 , I L I I i, I I,, I 11 I MOORING B2 TEMP VS TIME 15 PUG 78

74 MOORING 52 TEMP VS TIME 16 RUG 78

75 MOORING B2 TEMP VS TIME 17 AUG 78

76 MOORING B2 TEMP VS TIME 18 RUG

77 MOORING B2 TEMP VS TIME 19 RUG 78

78 MOORING B2 TEMP VS TIME 20 RUG

79 MOORING B2 TEMP VS TIME 21 RUG

80 ' MOORING B2 TEMP VS TIME 22 AUG 78

81 8 i i 1, I. I MOORING B2 TEMP VS TIME 23 RUG 78

82 ' MOORING B2 TEMP VS TIME 24 RUG

83 MOORING B2 TEMP VS TIME 25 RUG 78

84 MOORING B2 TEMP VS TIME 26 RUG 78

85 MOORING B2 TEMP VS TIME 27 AUG 78

86 MOORING B2 TEMP VS TIME 28 RUG 78

87 MOORING B2 TEMP VS TIME 29 RUG

88 MOORING B2 TEMP VS TIME 30 RUG 78

89 MOORING B2 TEMP VS TIME 31 HUG 78

90 MOORING 52 TEMP VS TIME 1 SEP 78

91 8 I MOORING B2 TEMP VS TIME 2 SEP 78

92 MOORING B2 TEMP VS TIME 3 SEP 78

93 8 I MOORING B2 TEMP VS TIME 4 SEP

94 8 I MOORING B2 TEMP VS TIME S SEP 78

95 MOORING B2 TEMP VS TIME 6 SEP 78

96 89 APPENDIX E Temperature Observations at B4

97 MOORING 64 TEMP VS TIME 28 JUL 78

98 MOORING B4 TEMP VS TIME 29 JUL 78

99 MOORING B4 TEMP VS TIME 30 JUL

100 MOORING B4 TEMP VS TIME 31 JUL 78

101 MOORING B4 TEMP VS TIME 1 RUG

102 O MOORING B4 TEMP VS TIME 2 AUG

103 MOORING B4 TEMP VS TIME 3 RUG 78

104 O MOORING B4 TEMP VS TIME 4 RUG

105 8 i. I I i I i, I MOORING B4 TEMP VS TIME 5 RUG

106 MOORING B4 TEMP VS TIME 6 RUG 78

107

108 MOORING B4 TEMP VS TIME RUG

109 MOORING B4 TEMP VS TIME 9 RUG

110 MOORING 84 TEMP VS TIME 1 0 RUG 78

111 MOORING B4 TEMP VS TIME 11 HUG 78

112 MOORING B4 TEMP VS TIME 12 RUG 78

113 F MOORING B4 TEMP VS TIME 13 RUG

114 MOORING B4 TEMP VS TIME 14 RUG 78

115 CD O F- ditl NOW MOORING B4 TEMP VS TIME 15 AUG

116 . 1.. I I MOORING B4 TEMP VS TIME 16 RUG 78

117 MOORING B4 TEMP VS TIME 17 AUG 78

118 0000 I I I i I MOORING B4 TEMP VS TIME 18 FIUG 78

119 MOORING B4 TEMP VS TIME 19 RUG 78

120 MOORING B4 TEMP VS TIME 20 RUG 78

121 MOORING B4 TEMP VS TIME 21 RUG 78

122 MOORING B4 TEMP VS TIME 22 RUG 78

123

124 wll MOORING B4 TEMP VS TIME 24 AUG

125 MOORING B4 TEMP VS TIME 25 RUG 78

126 2 co MOORING 84 TEMP VS TIME 26 RUG 78

127 MOORING B4 TEMP VS TIME 27 RUG 78

128 MOORING B4 TEMP VS TIME 28 RUG 78

129 MOORING B4 TEMP VS TIME 29 RUG

130 MOORING B4 TEMP VS TIME 30 RUG 78

131 MOORING B4 TEMP VS TIME 31 RUG 78

132

133 MOORING B4 TEMP VS TIME 2 SEP 78

134 MOORING B4 TEMP VS TIME 3 SEP 78

135