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Indian Journal of Geo-Marine Sciences
Vol. 40(4), August 2011, pp. 483-486
Research report
Climate change impact – A novel, initiative for Kerala
“Climate Change is the greatest ecological, economic
and social challenge of our time”
Earth’s Climate is undergoing noteworthy natural
changes for centuries. However the variations in the last
couple of centuries cannot be explained by natural
climatic variations alone. Inter-governmental Panel on
Climate Change (IPCC) had observed that this is due to
global warming. The increase in global average
temperature is due to the observed increase in
anthropogenic greenhouse gas concentrations.
Anthropogenic climate change has a significant role on
physical and biological systems all over the globe. In the
last centuary the global average surface temperature has
risen by 0.74oC. A few degree change in temperature
can attribute marked difference in global environment.
During the last interglacial the Polar Regions were 3 to
5°C warmer than today. The Sea Levels at that time
were 4 to 6 M higher than the present. The sea level rise
was 1.7 mm during the period 1870 to 1993. Whereas
during the year 1993-2007 the average rise in sea level
per year is 3.4 mm. Warming of the Oceans and melting
of ice are expected to lead to continued sea – level rise
of 18 to 79 cm in this century. Inter-governmental panel
on climate change has estimated a sea level rise of 21 to
71 cm in the year 2070 due to thermal expansion of
Oceans as well as melting of glacier. This will have
widespread effects on coastal zone and natural coastal
protective mechanisms.
Since the last little ice age, there is an invasion of
coastline towards land at the rate of 1 KM per
century. Apart from the above natural process coastal
zone is under tremendous pressure due to accelerated
sea level rise (anthropogenic impact) and other
invasions due to natural process. According to the
report of UNEP benefits from marine and coastal
ecosystem and other activities viz. coastal tourism,
trade and shipping, offshore oil and gas and fisheries
amounts to more than US $ 500 billion per year.
UNEP report states that the estimated global average
of Marine Biomes from per hectare estuary per year is
more than 20,000 US $, mangrove/tidal marshes is
more than 8000 US $, sea grass/algal bed is more than
16,000 US $ and coral reefs is more than 4000 US $.
The ocean and coastal areas influence all sectors of
the global economy. It is the only source of protein
for 1-2 billion people. The human presence, influence
and activity have reached in every parts of the ocean.
The growing contributions of human generated
emissions as a by-product of industrialization are
responsible for forcing the “greenhouse effect”. The
global warming due to greenhouse gas is triggering
and further accelerating the amplitude of climate
variability and rate of climate change. This will cause
increasing pressure on the ability of ecosystems and
human society to adapt with the changing climate
scenarios. The trend in greenhouse gas emissions for
the next few decades will have a significant influence
on climate by 2050 and beyond.
The security of coastal population is at risk due to
the sea level rise and increased intensity and frequency
of storms. The greenhouse effect on the impact of
hydrological cycle will cause increasing scarcity of
fresh water in the coastal region. The climate change
will have a variety of impacts on agriculture, human
health, biodiversity, coastal areas and water stress,
which will vary from region to region. A preliminary
assessment of expected regional impacts in Asia, based
on Intergovernmental Panel on Climate Change
(IPCC), published during the year 2007 states that
“(i) In parts of Asia, crop yield will decrease
between 2.5 to 10% by the year 2020s and 5 to 30% in
2050s; (ii) 120 million to 1200 million people
experience increased water stress by 2020s and 185
million to 981 million people by 2050s; (iii) predicted
significant sea level rise results in greater risk of
flooding and sea water intrusion, loss of coral reefs
estimated at 24% in the next ten years and 30% within
thirty years; (iv) increase in coastal water temperatures
could lead to causes of cholera in South Asia, increase
in mortality caused by diarrhoea disease in East, South
and South–East Asia; (v) within next 20-30 years,
glacier melt in Himalayas will lead to increased
flooding and avalanches and reduced river flows and
increased extinction rates.
Asia will be particularly vulnerable to the climate
change, because of its concentration of major
INDIAN J. MAR. SCI., VOL. 40, NO. 4, AUGUST 2011
484
population centers at low elevations. Mumbai, India;
Shanghai, China; Jakarta, Indonesia; Tokyo, Japan;
and Dhaka, Bangladesh are a few low lying major
population centers that are in a vulnerable situation
due to sea level rise. It is reported that five most
vulnerable countries with large populations are China,
India, Bangladesh, Vietnam and Indonesia. The
impact of climate change on developing nation is
highly significant. The implications of these potential
effects range from changes in ocean chemistry,
forecasted sea level rise, melt of glaciers, human
health and the displacement of coastal people.
India and Climate Change
India has a distinct geographical entity since it is
marked off from the rest of Asia by mountain and sea.
The geologic and tectonic history of the region is
complex. It is reported that during the year 2004 more
than 261 earthquakes events occurred in this region
before the divesting earthquake of 26th December
2004 and the tsunami that followed. There is an
apparent seismic quiescence around the seas of India.
This may change into extreme weather events
occasionally. It is detrimental to the coast and Islands
of India. India has 667 Islands in Bay of Bengal and
508 in Arabian Sea. Length of coastline of mainland
and Islands is 7516.6 KM. India have a land area of
3287263 sq.km and territorial waters of about
2465447.5 sq.km. Security of India’s coastline,
stability of economic life and better governance in
coastal region and Islands is highly significant.
The UNDP Human Development Report, 2007-08
reveals that developing nations near the equator will
be much vulnerable to sea level rise. Sea level rise
will be a pressing issue to countries in Asia. Based on
the above analysis, areas in India are more susceptible
to sea level rise. There are many small Islands in
Arabian Sea and Bay of Bengal. It is a fact that there
is very high density of population living in close
proximity to the coast. The Lakshadweep Islands are
regarded as atoll formation of corals. It consists of 36
islands. All these atolls are very small Islands. The
largest island has an area of 4.8 sq. km. and the
smallest is with an area of 0.1 sq. km. isotopic studies
carried out at NGRI, Hyderabad in the scleractinian
corals from these islands have shown decadal to inter-
decadal changes in SST during the last 120 yrs. Also
bacteria associated with the pollution are reported in
Porites corals from the Kavaratti (Lakshadweep)
island.
It is inferred that there will be increased coastal
erosion, inundations, persistent storm events, shifts in
wetlands, incursion of saline water into fresh water
aquifers, migrations of coral reefs, mangroves, tidal
flats, in the coastal environs of India. There are a few
studies related to the impact of sea level rise on the
fresh water aquifer of coast and Islands of India. The
impact of Sea Level Rise (SLR) for a scenario of 20
cm has been predicted for the Islands. There are many
sector specific initiatives to study the climate change
and the impact of sea level rise on the coastal
environment of India. However, there is no attempt to
assimilate integrated and reliable climate change
contextual information that is useful and usable to
local decision makers. There is no clear information
on the coastal ecosystem, Islands and Islets on which
the local adaptation decisions can be based and the
capacity of the local people to adapt and mitigate
from the vulnerability of impact of climate change.
This will drastically affect the livelihood and the
economic security of the local people.
Kerala and Climate Change
Kerala is acclaimed for its unique development
trajectory leading to high human (social) development
disproportionate to its economic growth. Kerala
stands first in the UNDP’s ranking of states in Human
Development Index for Indian States (Planning
Commission, 2002, Council for Social Development,
2008). In per capita consumption, Kerala stands at the
top though it ranks only fifth in per capita NSDP
(GoI, 2009).
Kerala has a fragile and closed eco-system. There
are both threats and opportunities for Kerala’s
sustainable development. Threats include the
following. State has the third highest population
density in India. (Kerala: 819, India: 324). Acute food
insecurity and import of food grains. Land hunger in
the state for housing and lively hood leads to
encroachment of forests and low lying wetlands. Due
to heavy unemployment, the slogan of industrial
development at any cost gets support, for the
employers using polluting technologies from the
workers as also the unemployed. Unregulated back-
water tourism (house boats) and ‘eco’ tourism in the
ecologically fragile lands. Pro-environment lobbies
are too weak, localized and fragmented. A major
weakness of these movements is the lack of scientific
and technical knowhow. The financial weakness of
the State government does not allow for financing
cleaner technologies to replace the existing polluting
SUNDARESAN & PATEL: CLIMATE CHANGE IMPACT
485
technologies. The existing low industrial base allows
for a strategy of future industrialization of the state
using less energy intensive and low GHG emission
technologies.
The state has a rich biodiversity potential. Kerala
possess 95 percent of the flowering plants in the
Western Ghats. Contains 90 percent of the vertebrate
fauna. Western Ghats in Kerala is one of the 34
world’s hot spots of biodiversity. Among the 34 it is
placed in the list of most important hottest
biodiversity hotspots. (Latha A, 2010). Kerala has
three floristic hot spots-Agastyamala, Anamala and
Silent Valley. Western Ghats in Kerala have 4500
species of flowering plants. Western Ghats have 145
species of mammals (of which 14 are endemic to
Western Ghats), 169 species of fresh water species,
93 species of amphibians (of which 40 are endemic).
There are 486 species of birds (of which 16 are
endemic to Western Ghats). There is also innumerable
micro flora and fauna. The State has two biosphere
reserves- Nilgiri and Agastyamala (GOK, 2008). State
has three out of twenty-five wetlands of international
importance included in the Ramsar list viz.,
Ashtamudi, Sasthamkotta and Vembanad-Kolland.
In Kerala, the emission rate of CO2 and other
green-house gases (GHG) are low. Kerala has a
critical eminence for Carbon Sequestration Potential.
In the percentage of geographic area covered by
forest, Kerala’s rank was the fourth (Kerala: 28.9%,
India: 23.4%) (GoI, 2005). The forests in Kerala are
better stocked than forests in other parts of India.
Kerala has high population density along the
coastal villages along with equally high density of
open wells. The climate induced changes are going
adversely affect livelihood options of the people of
Kerala, which has a 590 km long coastline. This
clearly indicates the vulnerability of the coastal
population of Kerala even to a few millimeter rise in
sea level. There are many sector specific initiatives to
study the climate change and the impact of sea level
rise on the other coastal environment of India.
However, there is no attempt to assimilate and
integrate the climate change contextual information
that is useful to the planners and decision makers of
the State. There is lack of explicit information on the
coastal ecosystems and islets upon which to base the
local adaptation decisions. It is imperative to develop
an integrated climate change contextual database and
information system in spatial domain for Kerala to
understand the interrelationship between the elements
of ecosystems, the changes that are likely happen to
them and their physical, social and economic impacts.
The International Conference on Climate Change
and Environment held at Cochin University of
Science and Technology during 24-27 October 2010
had recommended developing a multidisciplinary
project to study the impact of Climate Change in
Kerala. Researchers associated with climate change
studies had met many times during the year 2010 and
2011 and developed the project entitled “Climate
Change Database for Impact Assessment and
Development: Adaptation and Mitigation Options for
Kerala- A Multi disciplinary simulation and
modeling” Four national institutes of Council of
Scientific and Industrial Research (CSIR) viz. CSIR
Centre for Mathematical Modeling and Computer
Simulation (C-CMACS), Bangaluru, National
Institute for Interdisciplinary Science & Technology
(NIIST), Thiruvananthapuram, Central Road
Research Institute (CSIR-CRRI) and National
Institute of Science Communication And Information
Resources, New Delhi are the Central Institutes
associated with the development of the project. Centre
for Socio-economic and Environmental Studies
(CSES) a nongovernmental organization had
submitted detailed program along with Department of
Statistics of CUSAT and Department of Futures
studies of University of Kerala. Six Universities of
Kerala viz Kerala Fisheries and Ocean Science
University, University of Kerala and Kerala
Agriculture University (KAU), Vellanikkara, Trichur
and Cochin University of Science and Technology,
Kannur University and Kerala Veterinary and Animal
Science University are the participating organizations
oi the project. Many departments of Cochin
University of Science and Technology viz.
Department of Statistics, Kochi (CUSAT),
Department of Physical Oceanography, Kochi
(CUSAT), Department of Marine Biology, Kochi
(CUSAT), Department of Chemical Oceanography,
Kochi (CUSAT), Department of Atmospheric
Science, Kochi (CUSAT), Department of Ship
Technology and Department of Industrial Fisheries
are involved in the project. Indian Institute of
Information Technology and Management, Kerala
had submitted specific program for the study.
National Institute of Science Communication And
Information Resources (CSIR-NISCAIR), New Delhi
is the nodal organization and Dr Gangan Prathap,
Director, NISCAIR is the mentor of the project. The
INDIAN J. MAR. SCI., VOL. 40, NO. 4, AUGUST 2011
486
project will be submitted to the Department of
Science and Technology, Government of India for
financial support.
Objectives of the present study
A. To analyze the trends in climatic elements, their
spatial pattern and its relationship with extreme
events such as El Nino, cyclones, etc.
B. To assess the impact of climate change to
following sectors of Kerala a). Agriculture
(including plantation crops and spices), b)
Fisheries (marine and inland), c) Industries,
d)Transport–vehicular and inland water transports,
e) Tourism, f) Bio-diversity, g) Forestry, landshide
& rood, i) Road lagiog, maintenance.
C. To examine the spatial and temporal changes in
water resources (surface and groundwater -quantity
and quality), a) Specifically assess the dynamics of
riverine discharge and saline water incursion under
changing climate scenarios, b) Monsoonal
variations and its impact, c) Climate change
scenario on the islets of Kerala, d) Sea level rise
and natural resources of the coastal areas of Kerala:
demarcating the vulnerable regions. e) Examine the
biogeochemical evidences of climate change, f)
Develop a framework and decision support tool to
assess the climate change impacts on Livelihood
and developmental processes, g) Evolving a region
wise/localised specific adaptive measures for
Kerala. H) Looking into suitable sectoral
mitigation options under changing climate
scenarios, i) Assess the carbon sequestration
potential of Kerala, j) The study of the atmospheric
chemistry related to climate change and monsoonal
variations in the perspective of Kerala, k)
Developing large scale forecasting and modeling
of the various parameters using high power
computer simulation tools, l) Assist the local
bodies and stake holders in adopting appropriate
measures in developmental activities namely
industries, agriculture, and other livelihood options
of Kerala.
Expected Outcome of the study
The oceans, marine ecosystems and environment
were considered and managed in a sectoral way.
There were traditional management scheme for each
sector. Fisheries management did not consider other
marine uses. Use of ecosystem and fresh water
discharge to the coastal waters are managed with
different processes. Use of oceans under national
jurisdiction did not relate to uses of ocean areas
beyond national jurisdiction. Poverty alleviation was
not linked to a healthy marine environment. Whereas
the impacts of climate change threaten to alter the
marine environment at an extreme different entity and
scale. It is affecting all issues, sectors and peoples of
the world, an imperative for integrated and
sustainable marine management. Impact of climate
change had conceptualized and recognized that all
oceanic and atmospheric problems are linked and
must be considered as a whole system.
Present study is an attempt to integrate climate
change information into development and adaptation
efforts. It is planned to publish a guidance manual for
development planning to assist with the integration of
climate information into development efforts. This is
a prime tool to assist planners and stakeholders in
adapting to the changing climate. These basic
processes are essential for assessing vulnerability and
identifying and implementing climate change
adaptations. The present study will leads to strategic
interventions for developing capacity to improve
governance in the coastal regions under various
scenarios of climate change and extreme weather
events.
J Sundaresan
Lavkush Kumar Patel
Climate Change Informatics,
CSIR-National Institute of Science Communication
and Information Resources,
Dr. K S Krishnan Marg, Pusa Campus,
New Delhi-110012 India)
sundaresanj@hotmail.com, lavkush787@gmail.com