CLIMATE CHANGE IN VIETNAM AND RESPONSE Tran Thuc, Tran Hong Thai Nguyen Van Thang, Hoang Duc Cuong, Vietnam Institute of Hydro-Meteorology and

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1 CLIMATE CHANGE IN VIETNAM AND RESPONSE Tran Thuc, Tran Hong Thai Nguyen Van Thang, Hoang Duc Cuong, Vietnam Institute of Hydro-Meteorology and Environment

2 Contents Climate change in Vietnam Vietnam NTP to respond to CC Climate change scenarios for VN Potential Impacts of CC on stability of land use planing and sustainability

3 CLIMATE CHANGE IN VIET NAM

4 DIEN BIEN SA PA Năm TUONG DUONG BUON MA THUOT Năm RACH GIA BAC QUANG HA NOI Nă LANG SON Năm HUE NHA TRANG PHAN THIET PHU LIEN CC in Viet Nam: Temperature Over the past 50 years, annual average temperature has increased about 0.5 to 0.7 o C.

5 Climate Change in Vietnam More tyohoon with high intensitive Typhoon trajectory moves southward and typhoon season shifts to later months of the year. Cumulative tracks of tropical cyclones ( ) [Nicholls et al.., 2007]

6 Climate Change in Vietnam Rainfall increases in rainy season (Sep. to Nov.) More heavy rainfalls causing severe floods which occur more frequently in the Central and Southern VN. Rainfall decreases in dry season (Jul., Aug.). Drought happen every year in most regions of the country. CC already caused severe natural disaster, especially typhoons, floods and droughts Period

7 Climate Change in Vietnam Number of hot wave is more in , especially in the Central and South; Off-season extreme rainfall events occure more frequently. More profound are events in November in Ha Noi and surround in 1984, 1996, 2008.

8 Climate Change in Vietnam ENSO has stronger effects on weather and climate in Viet Nam

9 Observed Sea Water Level Hon Dau Station

10 Observed Sea Water Level Vung Tau Station

11 200 Chuẩn sai mực nước biển tại trạm Hòn Dấu và vệ tinh TOPEX/JASON-1 Chuẩnsai mựcnướcbiển(mm) Thời gian (năm) Hòn Dấu: 4mm/năm Topex/jason: 3.57 mm/năm Gauging Data and Satellite Data 100 Chuẩn sai mực nước biển tại trạm Sơn Trà và vệ tinh TOPEX/JASON-1 Chuẩn sai mực nước biển (mm) Thời gian (năm) Sơn Trà: 2.15mm/năm Topex/jason: 1.34 mm/năm Chuẩn sai mực nước biển tại trạm Vũng Tàu và vệ tinh TOPEX/JASON Chuẩn sai mực nước biển (mm) Vũng Tàu: 1.38mm/năm Thời gian (năm) Topex/jason: 3.06 mm/năm

12 Sea Level Change Based on OPEX và JASON-1 satellite data, No Station Latitute Longtutute Period Rate (mm/yr) 1 Hon Dau Son Tra Quy Nhon Vung Tau Average 3.0

13 NATIONAL TARGET PROGRAM TO RESPOND TO CLIMATE CHANGE (Decision No. 158/2008/QĐ-TTg dated 2 nd December 2008)

14 SCOPE The NTP will be implemented for the whole country in three phases: Phase I : Starting up Phase II : Implementation Phase III After 2015: Development IMHEN Copyright

15 OBJECTIVES Identify the the extent of of CC CC in in VN VN due due to to global CC CC and and assess CC CC impacts on on sector, area area and and locality Identify Identify measures to to respond respond to to CC CC Promote scientific and and technological activities to to establish the the scientific and and practical basis basis for for CC CC response measures Consolidate and and enhance enhance organisational structure, institutional capacity capacity and and the the development and and implementation of of policies policies to to respond respond to to CC CC Enhance public public awareness, responsibility & participation; and and develop develop human human resources to to respond respond to to CC CC Promote international cooperation to to obtain obtain external external support support in in response to to CC CC Mainstream CC CC issues issues into into socio-economic, sectoral sectoraland and local local development strategies, plans plans and and planning Develop and and implement action action plans plans of of ministries, sectors sectors and and localities to to respond respond to to CC CC IMHEN Copyright Strategic objectives are are to to assess CC CC impacts on on sectors and and regions in in specific periods and and to to develop feasible action plans to to effectively respond to to CC CC in in the the short and and long-term to to ensure sustainable development of of VN, to to take opportunities to to develop towards a lowcarbon economy, and and to to join join the the international community s efforts in in mitigating CC CC and and protecting the the climatic system

16 TASKS AND SOLUTIONS Identify the the extent of of CC CC and and assess CC CC impacts on on every sector, area and and locality Identify measures to to respond to to CC CC Promote scientific and and technological activities to to respond to to CC CC Enhance the the organisational structure, institutional capacity and and the the development and and implementation of of policies Enhance public awareness and and develop human resources Promote international cooperation Integrate CC CC issues into into socio-economic, sectoral and and local development strategies, plans and and planning Develop and and implement action plans of of all all ministries, sectors and and localities to to respond to to CC CC Develop and and implement projects IMHEN Copyright

17 No LIST OF PROJECTS Task, project I. Assess CC intensity and develop CC scenarios II Develop and implement science and technology programs on CC III Building capacity of organization, institution, policy on CC IV Awareness enhancement and human resources development V Enhance international cooperation VI Develop framework for mainstreaming CC issue into development VII Develop & implement action plans to respond to CC IMHEN Copyright

18 CLIMATE CHANGE, SEA LEVEL RISE SCENARIOS

19 Targets set by the NTP Complete CC scenarios, especially SLR, in Vietnam by early 2009 based on existing studies so that sectors and localities can use the scenarios to develop their action plans to respond to CC ; By the end of 2010, update CC scenarios, especially SLR, for each period between The scenarios must have a solid scientific and practical basis ; By 2015, Update CC scenarios, especially SLR, in Vietnam.

20 Human have emitted excessive greenhouse gas to the atmosphere through activities such as industry, agriculture, transportation, deforestation hence, the basis to greenhouse gas emission scenarios are: Development at global scale; Population and consumption; Income and way of life; Energy consumption and energy recourses; Technology transfer; and Land use change;

21 Greenhouse Gas Emission Scenarios IPCC recommended 6 groups: High emission scenarios: A1FI, A2 Medium emission scenarios: B2, A1B Low emission scenarios: A1T, B1

22 Referrences for Development of CC, SLR for VN Studies Oversea: The 2 nd (1995), 3 rd (2001), and 4 th (2007) IPCC AR; Results from the global climate model (MRI-AGCM) with 20 km resolution from the Met Research Institute and Japan Department of Met; Report of CC scenario for Vietnam by research group of Oxford University, UK; Data from TOPEX / POSEIDON and JASON1 satellite; Studies on SLR: CSIRO; Proudman Oceanographic Laboratory, Univ. of Hawaii Sea Level Center;... SLR scenarios in IPCC AR in 2001 and 2007; Reports on SLR from TIEMPO Climate Cyberlibrary

23 Referrences for Development of CC, SLR for VN Study in Viet Nam: 1) CC scenario in 1994, project funded by ADB; 2) CC scenario for the VN Initial Communication to UNFCCC; 3) CC scenario by IMHEN by applying MAGICC/SCENGEN 4.1 software and statistical downscaling method for VN and other smaller regions; 4) CC scenario by (IMHEN) for the preparation of the VN Second Communication to UNFCCC; 5) CC scenario by IMHEN in 2008 by applying MAGICC/SCENGEN 5.3 software and statistical downscaling method;

24 Referrences for Development of CC, SLR for VN Study in Viet Nam (Con t): 6) Results of study by IMHEN, SEA START and Hadley Centers in 2008 in applying PRECIS model to develop CC scenario for VN and SEA region; 7) Tidal gauge data along VN coasts; 8) Studies on SLR Marine Center, General Department of Sea and Island, MONRE; 9) SLR scenarios by IMHEN for the preparation of the VN Second Communication to UNFCCC

25 Method Used for Scenario Development Ensemble Global Climate Models (GCM) Dynamic Downscaling Statistical Downscaling MAGICC/SCENGEN soft wave Others (chart, interpolation,...) The statistical downscaling method analyze empirical data from weather stations and extrapolate the results into the future by using climate trend from the GCMs. Advantage: partly based on empirical local climate knowledge. Disadvantage: Availability of empirical data for long period without gaps.

26 Application of MRI/AGCM Model - Japan Calibration: - Stations used: 18 - Data: Monthly rainfall, temperature - Period:

27 Application of MRI/AGCM Model - Japan Comparison between Observed Data and Simulated Results: Temperature

28 Application of MRI/AGCM Model - Japan Comparison between Observed Data and Simulated Results: Rainfall

29 Application of MRI/AGCM Model - Japan c) Annual Rainfall Increase in whole country o C o C

30 Application of MRI/AGCM Model - Japan b) Annual Rainfall Increase Decrease

31 Application of PRECIS model - Hadley Center, UK Computation Domain

32 Application of PRECIS model - Hadley Center, UK period Temperature ( 0 C) Precipitation

33 Application of PRECIS model - Hadley Center, UK Change in temperature - A2 scenarios 0 C

34 Application of PRECIS model - Hadley Center, UK Change in precipitation - A2 scenario %

35 Application of MAGICC/SCENGEN software and Statistical Downscaling Method 24 N Trung quèc 22 N 20 N L µ o 18 N 16 N Th i Lan Q. Hoµng Sa 14 N 12 N C m pu chia 10 N 8 N 6 N Q. Tr-êng Sa 100 E 102 E 104 E 106 E 108 E 110 E 112 E 114 E

36 Climate Change Scenarios for Viet Nam Three GHG emission scenarios used for CC scenarios development are: Low scenario (B1); Medium scenario of the Medium Emission Group (B2).; Medium scenario of the High Emission Group (A2). CC scenarios for temperature and rainfall are developed for 7 climatic regions of Viet Nam: North West, North East, Northern Region, North of Central Region, South of Central Region, Central Highlands, and Southern Region. Baseline period is (same as that of IPCC 4 th Report).

37 Climate Change Scenarios for Viet Nam 1) Temperature Increase of temperature in Winter is higher than that in Summer in all climatic regions. Temperature in the North increases faster than in the South.

38 Changes in Annual Mean Temperature ( o C) Relative to , Medium Scenario (B2) Climatic Region Decades in the 21 Century North West North East North Delta North Central South Central Central Highlands South

39 Climate Change Scenarios for Viet Nam 2) Rainfall Rainfall in dry season decreases in all Regions, especially in the South. Rainfall in Wet season and annual rainfall increase.

40 Changes in Temperature and Rainfall in XII-II Low scenario (B1), Medium scenario (B2), High scenario (A2)

41 Changes in Temperature and Rainfall in III -V Low scenario (B1), Medium scenario (B2), High scenario (A2)

42 Changes in Temperature and Rainfall in VI -VIII Low scenario (B1), Medium scenario (B2), High scenario (A2)

43 Changes in Temperature and Rainfall in IX-VI Low scenario (B1), Medium scenario (B2), High scenario (A2)

44 Changes in Annual Mean Temperature and rainfall Low scenario (B1), Medium scenario (B2), High scenario (A2)

45 Sea Level Rise Scenarios SLR scenarios: Low Scenario: B1 Medium Scenarios: B2 High Scenarios: A1FI SLR Scenario Decades in the 21 Century Low (B1) Medium (B2) High (A1FI)

46 Potential Impacts of Climate change on stability of land use planing: Inundation Others

47 Red River Delta

48 Inundation Map of Ho Chi Minh City Area SLR: 0.65 m Inundated: 128 km 2 (6.3%) Based on Topographic Map Scaled 1/2.000 and 1/5.000 Sources: Department of Survey and Mapping, MONRE

49 Inundation Map of Ho Chi Minh City Area SLR: 0.75 m Inundation: 204 km 2 (10%) Based on Topographic Map Scaled 1/2.000 and 1/5.000 Sources: Department of Survey and Mapping, MONRE

50 Inundation Map of Ho Chi Minh City Area SLR: 1.0 m Inundation: 473 km 2 (23%) Based on Topographic Map Scaled 1/2.000 and 1/5.000 Sources: Department of Survey and Mapping, MONRE

51 Inundation Map of Mekong River Delta, SLR 0.65 m Basing on DEM (5 x 5 km) Provided by National Remote Sensing Center, MONRE SLR: 0.65 m Inundation: 5130 km 2 (13%)

52 Inundation Map of Mekong River Delta, SLR 0.75 m Basing on DEM (5 x 5 km) Provided by National Remote Sensing Center, MONRE SLR: 0.75 m Inundation: 7580 km 2 (19%)

53 Inundation Map of Mekong River Delta, SLR 1.0 m Basing on DEM (5 x 5 m) Provided by National Remote Sensing Center, MONRE SLR: 1.00 m Inundation: km 2 (38%)

54 Impacts of CC on fundamental conditions for sustainable land use planing: water resource, environment, ecological systems, socio-economics, energy,etc.

55 Impacts of Climate Change Public Health Water Respurses Agriculture Environ ment Climate Change Forestry Tourism Energy

56 Yield of rice decrease by 10% for every 1 o C increase in growing season minimum temperature (IPCC AR4 WG2TS, 2007) Impact on Agriculture Shift of planting boundary: By 2070s, tropical trees/ crops would be able to grow at the altitude meters higher and move km northwards compared to present. Large areas in Mekong and Red River deltas would be under salt water due to sea level rise. Source: Vietnam National communication

57 Impacts on Water Resources Instability in rainfall would cause more severe floods in rainy season and droughts in dry season. Increase in frequency and intensity of typhoons, storms would cause high floods & inundation, flash floods, landslide and erosion. Increasing water shortage and growing water demand threaten water supply, water use conflicts. Source: Vietnam National communication

58 Impacts on Forestry Decrease of mangrove forest, due to sea level rise. Forest with drought stand varieties would increase due to low soil moisture and high evapotranspiration. Biodiversity degradation: extinction of endangered species; Increasing risk of forest fire; Increase and wide spread of plant pests and diseases. Source: Vietnam National communication

59 Impacts on Aquaculture & Fisheries Sea level rise would reduce fresh water creatures in rivers & estuaries, high temperature reduce high valuable sub-tropical fishes; Habitat loss for young creatures due to mangrove decrease; Reducing sea products productivity and commercial quality due to: Migration of fishes; Reduction of body weight. Source: Vietnam National communication

60 Impacts on Coastal Zone Large areas of the Mekong, Red River deltas and Central coastal zone would be inundated due to sea level rise. Coastal & estuarine wetlands would be affected due to frequent floods, severe drought & salinity (Ca Mau, Ho Chi Minh City, Vung Tau and Nam Dinh) Livelihood of coastal population will be affected by more severe storms, flood, drought and sea level rise. Projections for a 1 m sea level rise: 15,000-20,000 km 2 of Mekong River delta flooded, affecting 3.5 to 5 million people, respectively. IPCC AR4, 2007

61 Impacts on Energy, Transportation Oil, gas platforms would be affected by typhoons, storms; Seaports and roads designed basing on historical sea level would be affected. Less energy generation due to drought ; Unstable flow regimes may lead to conflict in water regulation at hydropower stations. More energy consumption for due to high temperature and humidity. Source: Vietnam National communication

62 ... And many things else that should be considered... Conclusion: - Climate change is unavoidable - We have: Political wills, Roadmap, proposed approach, etc - We do NOT have: time Go ahead to Respond to Climate Change TOGETHER!

63 THANK YOU

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