Va iabili y o Ocean Hea Con en
and Ma ine Hea Wa es in he
No dic Seas
Sou a Cha e jee
Na ional Cen e o Pola and Ocean Resea ch, Goa, India
Indian Ins i u e o T opical Me eo ology, Pune, India
Na ional Con e ence on Pola Sciences (NCPS)- 2025
18 h Sep embe , 2025, Goa, India
Sou ce: CMEMS
Indian Pa icipan s
NCPOR, Goa NERCI, Kochi
Sou a Cha e jee (PI) Aji h Joseph (PI)
Babula Jena (Co-PI) Bindu G (Co-PI)
Sa hish K (JRF) Sa adhy S (JRF)
A c ic Ocean Ampli ica ion
Shu e al., 2022, Sci. Ad .
Unde he SSP585 scena io, he uppe -2000 m o he
A c ic Ocean wa ms a 2.3 imes he global mean a e
Ocean Hea T anspo > A mosphe ic Hea Loss
Shu e al., 2022, Sci. Ad .
Hea Con en in he No dic Seas
Sou ce: CMEMS
Cha e jee e al., 2018, GRL
La ges OHC inc ease wi hin he deep
basin gy es in he No dic Seas
No dic Seas ci cula ion is no only a passi e condui o
A lan ic Wa e
G eenland Sea Gy e ci cula ions edis ibu e he AW hea
wi hin he No dic Seas and downs eam in o he A c ic
Ocean Cha e jee e al., 2021, The C yosphe e
Hea Con en in he No dic Seas
Cha e jee e al., 2018, GRL
La ges OHC inc ease wi hin he deep
basin gy es in he No dic Seas
Majo componen s o
The Lo o en Basin:
A. The F on cu en o he wes
B. The Slope cu en o he eas
C. The deep basin gy e ci cula ion
Hea Con en in he No dic Seas
Cha e jee e al., 2018, GRL
La ges OHC inc ease wi hin he deep
basin gy es in he No dic Seas
Cha e jee e al., 2024, J.Clim
Majo componen s o
The Lo o en Basin:
A. The F on cu en o he wes
B. The Slope cu en o he eas
C. The deep basin gy e ci cula ion
Cold and F esh anomaly in he A lan ic Wa e in ecen yea s.
Hea Con en in he No dic Seas
Ye , Lo o en Basin con inued o wa m!! – D i en by local p ocesses.
Uppe Ocean hea con en and S e ic SSH
show inc easing end in he Lo o en Basin (LB),
pa icula ly in he sou hwes e n pa .
One known eason is educed hea loss in
win e (Mo k & Skagse h, 2019).
Gi en he impo ance o LB as he la ges
AW hea s o age and ci cula ion a iabili y,
I is impe a i e o unde s and he ole o
The ocean dynamics in he obse ed end
in OHC.
Hea Con en in he No dic Seas
Hea S o age Ra e
(700m)
A mosphe ic Hea Flux
RES -> Oceanic Con ibu ion
(ad ec ion, di usion, en ainmen e c.)
Moisan & Nille , 1998
Hea Con en in he No dic Seas
Ye , Lo o en Basin con inued o wa m!! – D i en by local p ocesses.
Recen wa ming in he Lo o en Basin o he No dic Seas, despi e coole AW in usion, is
pa ly d i en by a
Weakening end in he Lo o en Gy e ci cula ion, pa icula ly du ing summe .
Wi h hea gain om he a mosphe ic hea luxes, changes in he Lo o en Gy e ci cula ion can
a ou MHW e en s wi h subsu ace ex ension (e.g 2003) - compa able a mosphe ic and
oceanic con ibu ion
Howe e , wi h weak con ibu ion om a mosphe ic luxes, weakening o he gy e ci cula ion
alone can p omo e subsu ace MHW e en s in he Lo o en Basin, e en wi h weake su ace
signal (e.g 2016) –domina ed by oceanic con ibu ion.
Summa y
Thank you...
sou a @ncpo . es.in
