Slide1 l.jpg
1 / 60

GLOBAL WARMING.


102 views
Uploaded on:
Category: General / Misc
Description
Variable scenarios GLOBAL WARMING Temperatures are rising General principles, not numbers. GLOBAL WARMING “Greenhouse Effect” Solar Energy Balance (complicated mass balance problem) Three notable points about this graph 1 2 3 How does one ‘read’ past temperatures from ice?
Transcripts
Slide 1

Variable situations GLOBAL WARMING

Slide 4

Temperatures are rising

Slide 6

General standards, not numbers. An unnatural weather change “Greenhouse Effect” Solar Energy Balance (confounded mass equalization issue)

Slide 9

Three prominent focuses about this diagram 1 2 3 How does one ‘read’ past temperatures from ice?

Slide 10

Given that individuals were not measuring temperature or environmental CO 2 400,000 years back, in what capacity would we be able to develop the past realistic? Isotope development (C, N,..) is temperature subordinate. Isotopes are in harmony in environment. Statement catches an isotope's sign proportion of the air This isotope proportion can be aligned to distinguish an atmosphere signal. Testimony can originate from ice centers (H 2 O, CO 2 ), diatoms (calcium carbonate), or other hard residue. O 18/O 16 C 13/C 12

Slide 12

The world's temperature is a matter of warmth harmony between sunlight based inputs and misfortune through the environment The earth’s temperature is controlled by: The measure of sun powered vitality the earth gets Sunspot action causes vacillations Variations in earth’s circle around sun The measure of sun oriented vitality the earth reflects/refracts A planet's component surface and air Retention of warmth by the air An element of common and anthropogenic gasses Evaporation and buildup of water vapor Climate gives criticism to adjust itself

Slide 13

Climate differs in light of the fact that sun oriented vitality shifts Milankovitch cycles Variation in the Earth ’ s circle causes variety in sun based vitality consumed and drive long haul environmental change

Slide 14

SURFACE TEMPERATURE Al Gore “AIT” point: - The 10 hottest years on record have ALL been in the most recent 14 years .- - Temperature deviation The issue with temp: 1900 1920 1940 1960 1980 2000 Recently, temps are up, up, up

Slide 16

Charles Keeling

Slide 17

Atmospheric CO 2 is expanding all over the place we search for it

Slide 18

Where we now stand 30% 370 ppm 285 ppm

Slide 19

Gasses fluctuate in warmth catching capacities. Bigger atoms trap more warmth. Bigger atoms likewise stay in environment longer.

Slide 20

Other nursery gasses are expanding also SOURCE: Livestock Draining wetlands Warming wetlands Industry 985 1185 1385 1585 1785 1985

Slide 21

What we know for certain The grouping of warmth catching gasses in the air is rising The earth’s temperature is rising The size of both is steady with human brought on an Earth-wide temperature boost

Slide 26

Global Circulation Models GCM’s Models Hadley Cell models - UK CCC-Canadian Climate Center models PCM (US DOE/NCAR) , others Idea: Model atmosphere on 1 o framework cells, as we comprehend it. Check by foreseeing present day atmosphere Modify air (include nursery gasses, blend) Predict future

Slide 28

1. Expanding warmth catching gasses, builds surface warmth The warming components 1

Slide 29

2 1 2 3 2 3 Ice mists reflect more sunlight based vitality than water mists Particulates reflect warm as opposed to trap warm High surface albedo reflects warm instead of ingest it

Slide 30

Add surface impacts that drive atmosphere from sun oriented vitality Evaporation Latent warmth Condensation Convection streams Air weight contrasts Coriolis impact Climate: a world's accumulation ’ s climate

Slide 31

And, you get a model… December, January February June, July, August GFHI UKHI Predicted Temperature Increase: most prominent at high scopes amid the winter months

Slide 33

2001 Report

Slide 35

HADLEY MODEL PCM MODEL WINTER Summer Reduced BAU Reduced BAU

Slide 36

Fig. 2. Normal snowpack SWE for 2020-2049 and 2070-2099 communicated as a normal's percent for the reference period 1961-1990 for the Sierra Nevada locale depleting into the Sacramento-San Joaquin stream framework Hayhoe, Katharine et al. (2004) Proc. Natl. Acad. Sci. USA 101, 12422-12427 Copyright ©2004 by the National Academy of Sciences

Slide 37

Model instability is ‘large’ 3.5-8.5 o C at balance Think about this as a likelihood conveyance with 3.5 and 8.5 just as likely, however 5.5 significantly more likely than either.

Slide 38

Uncertainties Cause and Effect. We have a model, yet we don't be able to lead a controlled examination with the climate. Spatial variability in warming changes among models It is exceptionally variable; anticipating this variety is tricky Consequences of warming eg, ocean level ascent; wellbeing issues; farming, characteristic living spaces

Slide 39

Primary wellsprings of instability Aerosols in the environment Large fire occasions (eg, Indonesia, Mexico) Volcanoes (eg, Mt. Pinatubo) Air contamination Feedbacks from characteristic frameworks Clouds and water vapor Ocean streams Surface albedo, outgassing of swamps, and so on Human conduct as for emanations

Slide 40

Uncertainty, gee? Utilize an agreement based methodology. Use UN as a stage to gather vast gatherings of researchers to talk about and concur upon explanations with respect to: Likely greatness of nursery gas discharges under different future situations Likely impacts of those emanations on atmosphere Likely impacts of environmental change on human prosperity and natural frameworks

Slide 43

IPCC Fourth Assessment Report Synthesis Report Dr. R K Pachauri Chairman Intergovernmental Panel on Climate Change Press Presentation Saturday, 17 November 2007 Valencia, Spain INTERGOVERNMENTAL PANEL ON CLIMATE CHANGE (IPCC)

Slide 44

B2 situation - Reduced CO2 outflows

Slide 45

Precipitation models are more variable.

Slide 46

Bottom Line on Climate Projections Most warming is at high scopes amid winter months (up to 12 o C) Global mean warming is anticipated to be 1.4-5.8 o C, with adjustment at 2 x CO 2 (not prone to balance out there, however) Global mean warming of 3-8 o C at harmony CO 2 Precipitation increments, yet by and large abatements over landmasses amid the mid year Precipitation models are profoundly variable in space and among models. For the most part result in expanded water stress

Slide 47

Variable situations Different situations concentrate on distinctive human practices

Slide 49

Emissions situations

Slide 50

CO2 focuses Double CO2 Now

Slide 51

Temperature forecast

Slide 56

BrydenH., LongwortH. & CunninghamS. Nature , 438 . 665 - 657 (2005). Nov. 30, 2005 North Atlantic current eases back by 30% with respect to 50 years prior. - Driven by crisp water inputs (rain and ice melt). - Predicted by warming models. - Consequence: cooling in Europe.

Slide 58

GCM’s foresee mean results, however not frequencies of amazing occasions, making it extreme to say whether late increment in storm recurrence and power is regular variety or anthropogenic Extreme Events

Slide 60

And that, more or less,