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Title: Towards a realistic simulation of boreal summer tropical rainfall climatology in state-of-the-art coupled models

Speaker: Pascal Terray
Laboratoire d'Océanographie et du Climat: Experimentation et approches numériques
Institut Pierre Simon Laplace
Université Pierre & Marie Curie
Paris, France

Date/Time: 3:30 PM, Thursday, 15 November 2018.

Venue: CAOS Seminar Hall

State-of-the-art global coupled models used in seasonal prediction systems and climate projections still have important deficiencies in representing the boreal summer tropical rainfall climatology. These errors include prominently a severe dry bias over all the Northern Hemisphere monsoon regions, excessive rainfall over the ocean and an unrealistic double Inter-Tropical Convergence Zone (ITCZ) structure in the tropical Pacific. While these systematic errors can be partly reduced by increasing the horizontal atmospheric resolution of the models, they also illustrate our incomplete understanding of the key mechanisms controlling the position of the ITCZ during boreal summer.
Using a large collection of coupled models and dedicated coupled experiments, we show that these tropical rainfall errors are partly associated with insufficient surface thermal forcing and incorrect representation of the surface albedo over the Northern Hemisphere continents. Improving the parameterization of the land albedo in two global coupled models leads to a large reduction of these systematic errors and further demonstrates that the Northern Hemisphere subtropical deserts play a seminal role in these improvements through a heat low mechanism.


Announcements / Jeremy Grantham Lecture on Climate Change
« on: November 08, 2018, 10:40:43 AM »

Prof. David Battisi, University of Washington, Seattle,USA will deliver the 14th Jeremy Grantham lecture on

Why is there an ocean overturning circulation in the North Atlantic and not in the North Pacific?
8 Nov  (Thursday) CAOS seminar hall 3.30 pm Tea at 3.15 pm

"Climate Change and Global Food Production"
on Friday 9th Nov at 3.30 pm in Divecha auditorium.


Dear Sir/Madam,

As part of the SMART training and outreach activities of Space Applications Centre (SAC), ISRO, Ahmedabad,  four days training programme on ‘Satellite based Sounding of the Atmosphere: Techniques and Applications’ is planned during 27-30 November 2018 at SAC, Ahmedabad.

I hereby enclose the details of this training programme and the application form. Request you to forward the details to interested scientists/students working in your organisation.
Thanking you,

Warm regards,

V. Sathiyamoorthy
Dr. V. Sathiyamoorthy
Scientist-SG & Head
Space Applications Centre, Bopal Campus
Indian Space Research Organisation
BOPAL, Ahmedabad -380058
Phone: 079-26916112

Fax: 079-26916127

Announcements / Invited Talk DCCC, IISc
« on: September 17, 2018, 01:14:40 PM »

Dear All,

Divecha Centre for Climate Change

Indian Institute of Science


Guest Lecture



Speaker                      : Dr. Indra Sekhar Sen

                                        Assistant Professor

Department of Earth Sciences
Indian Institute of Technology, Kanpur


Title                             : Stable Water Isotope Modeling of Glacier Meltwater in Headwaters of the Hindu   Kush Himalayan Rivers: Variability in Space, Time and Possible Causes


Date & Time               : 19th September 2018 (Wednesday) & at 11.00 AM


Venue                         : Conference room (No. D305), Divecha Centre for Climate Change


Host                            : Dr. Anil V Kulkarni


Coffee/ Tea                 : at 10.45 AM



****All are cordially invited***


Abstract                      Himalayan headwater rivers are primarily sourced from glacier meltwater and from Indian summer monsoon (ISM) precipitation, both of which will be strongly influenced by ongoing and future climate change. Hydrologic modeling studies suggest that the glacier meltwater contribution is highest during the warm, dry pre-ISM months (April – June), but this hypothesis is currently hindered by a lack of observational data. To provide new spatial and temporal constraints on end-member contributions in Himalayan streams, we measured electrical conductivity and stable water isotopes (δ18O and δD) in nested catchments throughout the Upper Ganges Basin across three seasons (pre-ISM, ISM, post-ISM) over three years (2014 – 2016). For all time points, we observed a sharp depletion in δ18O and δD moving toward higher elevations, coincident with precipitation isotope trends. Using a site- and season-specific isotope mixing approach, our analyses further revealed large seasonal variability in end-member contributions throughout the basin. Surprisingly, glacier meltwater contributions were highest during the ISM (July – September) and post-ISM (October – December) seasons, contrary to previous model predictions. In addition to protracted storage of glacier meltwater in groundwater aquifers, this result supports "rain-induced" glacier melting during the ISM, which we show can produce 3 – 11 % of total discharge at the glacier snout. In conclusion, glacier meltwater contributions to Himalayan streams exhibit complex seasonal dynamics; this interpretation should be considered when predicting hydrologic responses to climate change in this region.


For more details          : or


Arya A.R

Divecha Centre for climate Change

Indian Institute of science




Gap-filling streamflow data is a critical step for most hydrological studies, such as streamflow trend, flood, and drought analysis and hydrological response variable estimates and predictions. However, there is a lack of quantitative evaluation of the gap-filled data accuracy in most hydrological studies. Here we show that when the missing data rate is less than 10 %, the gap-filled streamflow data obtained using calibrated hydrological models perform almost the same as the benchmark data (less than 1 % missing) when estimating annual trends for 217 unregulated catchments widely spread across Australia. Furthermore, the relative streamflow trend bias caused by the gap filling is not very large in very dry catchments where the hydrological model calibration is normally poor. Our results clearly demonstrate that the gap filling using hydrological modelling has little impact on the estimation of annual streamflow and its trends.

Announcements / [Seminars] CAOS: 3:30 pm Tuesday 21 August 2018
« on: August 20, 2018, 12:22:45 PM »

CAOS seminars:

Tuesday Aug. 21 - Studies on improving quantitative precipitation forecasting

Speaker: M K Yau, McGill University, Montreal, Canada

Time: 3:30 pm

Venue: CAOS Seminar Hall

Speaker's Bio:

M. K. (Peter) Yau received his B.Sc., M. Sc., and Ph.D. degrees from the Massachusetts Institute of Technology. He then joined the Department of Atmospheric
and Oceanic Sciences at McGill University and is a full professor and the senior NSERC/Hydro-Quebec Industrial Research
Chair. He has made contributions in understanding detailed cloud processes, hurricanes, convection and cyclones, and the physics of precipitation. He was
the recipient of the President’s Prize of the Canadian Meteorological and Oceanographic Society (CMOS) and was elected a
CMOS Fellow. He is the co-author of a popular textbook “A Short Course in Cloud Physics, 3rd Edition”.

Coffee/Tea: 3:20pm

All are welcome


CAOS seminar:

Title: Recent studies on tropical cyclones

Speaker: M K Yau, McGill University, Montreal, Canada

Date and Time: Monday Aug 20, 3:30 pm

Venue: CAOS Seminar Hall

Speaker's Bio:

M. K. (Peter) Yau received his B.Sc., M. Sc., and Ph.D. degrees from the Massachusetts Institute of Technology. He then joined the Department of
Atmospheric and Oceanic Sciences at McGill University and is a full professor and the senior NSERC/Hydro-Quebec Industrial Research
Chair. He has made contributions in understanding detailed cloud processes, hurricanes, convection and cyclones, and the physics of precipitation. He
was the recipient of the President’s Prize of the Canadian Meteorological and Oceanographic Society (CMOS) and was elected a
CMOS Fellow. He is the co-author of a popular textbook “A Short Course in Cloud Physics, 3rd Edition”.

Coffee/Tea: 3:20pm

All are welcome

Announcements / Panel discussion on climate imperatives
« on: August 06, 2018, 08:57:25 AM »


Bengaluru: The panel discussion on climate imperatives, moderated by Mint’s energy editor Utpal Bhaskar, included J. Srinivasan, distinguished scientist, Divecha Centre for Climate Change; Jagdish Krishnaswamy, senior fellow, Ashoka Trust for Research in Ecology and the Environment; Aromar Revi, director, Indian Institute for Human Settlements; and Ulka Kelkar, senior climate policy lead, World Resources Institute India. Edited excerpts:

What are your views on the conundrum between environmental issues and growth?

Announcements / Talks on Radar Meteorology
« on: August 06, 2018, 08:53:33 AM »

Centre for Atmospheric & Oceanic Sciences
Indian Institute of Science

Prof. V. Chandrasekhar, University of Colorado is visiting IISc as BEL Chair Professor.

Date and title of his  talks are given given below.

8 Aug 2018 (Wed)        3 pm - 5 pm        Introduction to radar meteorology
                            (with 15 min tea break)

9 Aug 2018 (Thu)        3 pm - 5 pm        Polarimetric Radar & Interpretation
                                                                    of Radar observations

10 Aug 2018 (Fri)     3 pm - 5 pm       Radar signal attenuation correction 
                                                                 and weather radar data quality
16  Aug 2018 (Thu)    3.30 pm - 5 pm    From raindrops to Floods: Advances,
                                                                    Challenges and Opportunities in
                                                                   rainfall Measurement using
                                                                   Dual-polarization Radar

17  Aug 2018 (Fir)    3 pm - 5 pm        Rainfall  estimation and hydrometeor
                                                                   Classification from radar data

Venue: CAOS Seminar Hall.
Note:      16th Aug talk is a Public Lecture and will be held in the Faculty Hall, Main Building.

All those interested are welcome to attend

G S Bhat
Centre for Atmospheric & Oceanic Sciences
Indian Institute of Science
Bengaluru 560012, India


Announcements / Lecture Series by Dr. Remy Roca
« on: July 31, 2018, 10:15:14 AM »

Dr. Remy Roca , Scientist, Laboratoire d’Etudes en Géophysique et Océanographie Spatiales(LEGOS), Toulose, France is visiting CAOS/DCCC from 30th July to 3rd
August. He will be giving the following lectures

31 July, Tuesday,  3.30 pm  CAOS seminar hall : Achievements of the Meghatropiques Mission

1 Aug  ,Wednesday,   3.30 pm CAOS Seminar hall: Water and energy budget of Mesoscale Convective Systems

2 Aug  ,Thursday,   3.30 pm CAOS Seminar hall: A new model for Mesoscale Convective  Systems


Distinguished  Scientist

Divecha Centre for Climate Change

Honorary Professor

Centre for Atmospheric and Oceanic Sciences

Indian Institute of Science, Bengaluru



Announcements / PhD Student Assistanships in Hydrology/Flood Modeling
« on: July 30, 2018, 07:16:10 PM »

Dear all,

The Department of Civil and Environmental Engineering at Florida International University is looking for three PhD students for the Spring of 2019 (January 2019). The students will work on a NSF-funded project related to smart and green technologies for flood control. The ideal students need to have an outstanding experience in flood simulation (1D and 2D) and watershed-scale hydrological modeling. Experience with forecast simulation modeling (e.g., Quantitative Precipitation Forecasts (QPF))  and global optimization (e.g., GA, pattern search) is a plus.


Please send your CV, GRE and TOEFL (if applicable) scores, brief statement of your academic accomplishments, list of publications to Dr. Arturo S. Leon ( by August 15 of 2018.


Best regards,

Arturo S. Leon

Announcements / Berkeley postdoc and programmer positions
« on: July 30, 2018, 08:31:10 AM »

As part of a new joint effort between UC Berkeley, UC Davis, and the Lawrence Berkeley Lab, we are seeking 2 postdocs and a software developer/programmer to work on projects aimed at improving understanding and predictions of extreme monsoon rainfall.  Further details can be found here:

Please feel free to forward to any interested parties.


William R. Boos

Announcements / Faculty Recruitment in IIT Kanpur 2018
« on: July 26, 2018, 10:13:58 AM »

Indian Institute of Technology (IIT) Kanpur (UP), an Institute of national importance, invites applications for following sarkari naukri vacancy for  Faculty positions of  Professors, Associate Professors and Assistant Professors in various departments/subjects. (Advt No. DF-2/2017) :

Application is to submit to  IIT Kanpur: on or before 31/08/2018.


Aerospace Engineering, Biological Sciences & Bioengineering, Chemical Engineering, Civil Engineering, Computer Science and Engineering, Earth Sciences, Economic Sciences, Electrical Engineering, Humanities and Social Sciences, Industrial and Management Engineering, Materials Science and Engineering, Mechanical Engineering, Mathematics and Statistics, Chemistry and Physics


Professor  in the Pay Level   14A
Associate Professor in the Pay Level  13A2
Assistant Professor Grade- I in the Pay Level  12
Assistant Professor Grade-II in the Pay Level  10 and 11

Minimum Qualification

Minimum Qualification: Ph.D. with first class or equivalent (in terms of grades) at the preceding degree in the appropriate branch, with a very good academic record throughout (also see in Notes below). In addition, for:

Professor : 10 years teaching/research/industrial experience of which at least 04 years should be at the level of Associate Professor in IITs, IISc Bangalore, IIMs, NITIE Mumbai and IISERs.
Associate Professor : 06 years Teaching/Research/Industrial experience of which at least 03 years should be at the level of Assistant Professor, Senior Scientific Officer/Senior Design Engineer.
Assistant Professor : Minimum three years Industrial/Research/Teaching experience, excluding however, the experience gained while pursuing Ph.D.


Post-Doc Positions available in areas of sediment transport and hyodynamics, Zhejiang University
posted July 5, 2018 by Ms. Sally FENG
What to study: Sediment transport; Hydrodynamics

Where: Zhoushan Compus, Zhejiang University, China

To be appointed: 4 Post-doc Research Fellows



l  PhD (obtained recently) in Hydraulic Engineering, Coastal Engineering, Mechanics, or Applied Mathematics


Salary and benefits

l  180,000-300,000RMB (equivalent to US$27,000-45,000)

l  Apartment available for rent

l  Financial support for attending conferences

l  Reward for research output


Application procedure

l  Send us CV, including academic and working history, thesis title and abstract, and full-papers published

l  Attend interview

l  Submit online application at



Professor CHENG Nian Sheng

Formerly working at Nanyang Technological University, Singapore, Prof Cheng joined Zhejiang University in June 2018.



Email:  (程年生)


Professor HE Zhiguo

Deputy Director of Institute of Port, Coastal and Offshore Engineering


Email: (贺治国)

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