P. D. Naidu1 , N. Niitsuma2 , and S. Naik1
P. D. Naidu et al.
P. D. Naidu1 , N. Niitsuma2 , and S. Naik1
1 CSIR – National Institute of Oceanography Dona Paula 403 004, Goa, India 2 Institute of Geosciences, Shizuoka University, 836 Oya, Shizuoka 422-8529, Japan
1 CSIR – National Institute of Oceanography Dona Paula 403 004, Goa, India 2 Institute of Geosciences, Shizuoka University, 836 Oya, Shizuoka 422-8529, Japan
Hide author details
Received: 13 Aug 2014 – Discussion started: 01 Sep 2014
The variation of stable isotopes between individual shells of planktic foraminifera of a given species and size may provide short-term seasonal insight on Paleoceanography. In this context, oxygen isotope analyses of individual Globigerinoides sacculifer and Neogloboquadrina dutertrei were carried out from the Ocean Drilling Program Site 723A in the western Arabian Sea to unravel the seasonal changes for the last 22 kyr. δ18 O values of single shells of G. sacculifer range from of 0.54 to 2.09‰ at various depths in the core which cover a time span of the last 22 kyr. Maximum inter-shell δ18 O variability and high standard deviation is noticed from 20 to 10 kyr, whereas from 10 kyr onwards the inter shell δ18 O variability decreased. The individual contribution of sea surface temperature (SST) and sea surface salinity (SSS) on the inter shell δ18 O values of G. sacculifer were quantified. Maximum seasonal SST between 20 and 14 ka was caused due to weak summer monsoon upwelling and strong cold winter arid continental winds. Maximum SSS differences between 18 and 10 ka is attributed to the increase of net evaporation minus precipitation due to the shift of ITCZ further south. Overall, winter dominated SST signal in Greenland would be responsible to make a teleconnection between Indian monsoon and Greenland temperature. Thus the present study has wider implications in understanding wether the forcing mechanisms of tropical monsoon climate lies in high latitudes or in the tropics.
P. D. Naidu et al.
Viewed
Total article views: 1,462 (including HTML, PDF, and XML)
HTML
PDF
XML
Total
BibTeX
EndNote
955
405
102
1,462
58
108
HTML: 955
PDF: 405
XML: 102
Total: 1,462
BibTeX: 58
EndNote: 108
Views and downloads (calculated since 01 Sep 2014)
Month
HTML
PDF
XML
Total
Sep 2014
98
88
3
189
Oct 2014
30
31
1
62
Nov 2014
25
23
1
49
Dec 2014
5
16
2
23
Jan 2015
12
9
3
24
Feb 2015
17
2
0
19
Mar 2015
11
3
0
14
Apr 2015
10
2
0
12
May 2015
5
4
0
9
Jun 2015
6
4
2
12
Jul 2015
9
4
1
14
Aug 2015
2
2
0
4
Sep 2015
2
3
0
5
Oct 2015
5
2
0
7
Nov 2015
9
2
1
12
Dec 2015
2
7
0
9
Jan 2016
16
6
0
22
Feb 2016
7
1
1
9
Mar 2016
8
2
0
10
Apr 2016
2
2
0
4
May 2016
2
1
0
3
Jun 2016
7
5
0
12
Jul 2016
5
2
1
8
Aug 2016
5
2
0
7
Sep 2016
5
2
0
7
Oct 2016
7
2
0
9
Nov 2016
7
2
1
10
Dec 2016
4
3
0
7
Jan 2017
11
2
1
14
Feb 2017
15
1
4
20
Mar 2017
26
2
13
41
Apr 2017
25
4
10
39
May 2017
27
1
10
38
Jun 2017
29
9
38
Jul 2017
9
1
1
11
Aug 2017
3
0
3
Sep 2017
7
1
0
8
Oct 2017
4
0
4
Nov 2017
5
0
5
Dec 2017
11
0
11
Jan 2018
8
0
8
Feb 2018
14
2
4
20
Mar 2018
8
2
0
10
Apr 2018
13
3
1
17
May 2018
8
4
2
14
Jun 2018
4
4
1
9
Jul 2018
14
5
1
20
Aug 2018
8
2
0
10
Sep 2018
6
4
0
10
Oct 2018
14
2
1
17
Nov 2018
10
6
1
17
Dec 2018
5
3
0
8
Jan 2019
7
3
0
10
Feb 2019
7
4
0
11
Mar 2019
6
3
0
9
Apr 2019
6
6
0
12
May 2019
4
2
0
6
Jun 2019
5
2
0
7
Jul 2019
7
4
0
11
Aug 2019
5
2
0
7
Sep 2019
2
3
0
5
Oct 2019
8
2
1
11
Nov 2019
7
2
0
9
Dec 2019
3
1
0
4
Jan 2020
7
3
1
11
Feb 2020
10
3
0
13
Mar 2020
1
0
1
Apr 2020
6
3
1
10
May 2020
3
1
1
5
Jun 2020
5
0
5
Jul 2020
14
5
6
25
Aug 2020
2
5
4
11
Sep 2020
1
0
1
Oct 2020
4
2
1
7
Nov 2020
8
4
1
13
Dec 2020
6
4
1
11
Jan 2021
5
4
1
10
Feb 2021
8
2
0
10
Mar 2021
6
2
0
8
Apr 2021
6
4
0
10
May 2021
8
3
0
11
Jun 2021
8
1
9
Jul 2021
7
3
0
10
Aug 2021
9
2
11
Sep 2021
12
2
0
14
Oct 2021
19
3
0
22
Nov 2021
17
4
1
22
Dec 2021
10
2
0
12
Jan 2022
10
1
0
11
Feb 2022
10
2
1
13
Mar 2022
8
2
10
Apr 2022
9
3
0
12
May 2022
6
4
0
10
Jun 2022
3
1
0
4
Jul 2022
6
1
0
7
Aug 2022
11
5
0
16
Sep 2022
2
2
0
4
Oct 2022
5
1
0
6
Nov 2022
7
1
0
8
Dec 2022
13
6
1
20
Jan 2023
9
3
0
12
Feb 2023
1
0
1
Cumulative views and downloads
(calculated since 01 Sep 2014)
Month
HTML views
PDF downloads
XML downloads
Sep 2014
98
88
3
Oct 2014
128
119
4
Nov 2014
153
142
5
Dec 2014
158
158
7
Jan 2015
170
167
10
Feb 2015
187
169
10
Mar 2015
198
172
10
Apr 2015
208
174
10
May 2015
213
178
10
Jun 2015
219
182
12
Jul 2015
228
186
13
Aug 2015
230
188
13
Sep 2015
232
191
13
Oct 2015
237
193
13
Nov 2015
246
195
14
Dec 2015
248
202
14
Jan 2016
264
208
14
Feb 2016
271
209
15
Mar 2016
279
211
15
Apr 2016
281
213
15
May 2016
283
214
15
Jun 2016
290
219
15
Jul 2016
295
221
16
Aug 2016
300
223
16
Sep 2016
305
225
16
Oct 2016
312
227
16
Nov 2016
319
229
17
Dec 2016
323
232
17
Jan 2017
334
234
18
Feb 2017
349
235
22
Mar 2017
375
237
35
Apr 2017
400
241
45
May 2017
427
242
55
Jun 2017
456
242
64
Jul 2017
465
243
65
Aug 2017
468
243
65
Sep 2017
475
244
65
Oct 2017
479
244
65
Nov 2017
484
244
65
Dec 2017
495
244
65
Jan 2018
503
244
65
Feb 2018
517
246
69
Mar 2018
525
248
69
Apr 2018
538
251
70
May 2018
546
255
72
Jun 2018
550
259
73
Jul 2018
564
264
74
Aug 2018
572
266
74
Sep 2018
578
270
74
Oct 2018
592
272
75
Nov 2018
602
278
76
Dec 2018
607
281
76
Jan 2019
614
284
76
Feb 2019
621
288
76
Mar 2019
627
291
76
Apr 2019
633
297
76
May 2019
637
299
76
Jun 2019
642
301
76
Jul 2019
649
305
76
Aug 2019
654
307
76
Sep 2019
656
310
76
Oct 2019
664
312
77
Nov 2019
671
314
77
Dec 2019
674
315
77
Jan 2020
681
318
78
Feb 2020
691
321
78
Mar 2020
692
321
78
Apr 2020
698
324
79
May 2020
701
325
80
Jun 2020
706
325
80
Jul 2020
720
330
86
Aug 2020
722
335
90
Sep 2020
722
336
90
Oct 2020
726
338
91
Nov 2020
734
342
92
Dec 2020
740
346
93
Jan 2021
745
350
94
Feb 2021
753
352
94
Mar 2021
759
354
94
Apr 2021
765
358
94
May 2021
773
361
94
Jun 2021
781
361
95
Jul 2021
788
364
95
Aug 2021
797
364
97
Sep 2021
809
366
97
Oct 2021
828
369
97
Nov 2021
845
373
98
Dec 2021
855
375
98
Jan 2022
865
376
98
Feb 2022
875
378
99
Mar 2022
883
378
101
Apr 2022
892
381
101
May 2022
898
385
101
Jun 2022
901
386
101
Jul 2022
907
387
101
Aug 2022
918
392
101
Sep 2022
920
394
101
Oct 2022
925
395
101
Nov 2022
932
396
101
Dec 2022
945
402
102
Jan 2023
954
405
102
Feb 2023
955
405
102
Cited
Saved
Latest update: 08 Feb 2023