Climate Change

Clara López - Francisca de Cabrera 

Climate change is a significant and lasting change in the statistical distribution of weather patterns over periods ranging from decades to millions of years. It may be a change in average weather conditions, or in the distribution of weather around the average conditions (i.e., more or fewer extreme weather events). Climate change is caused by factors that include oceanic processes (such as oceanic circulation), variations in solar radiation received by Earth, plate tectonics and volcanic eruptions, and human-induced alterations of the natural world; these latter effects are currently causing global warming, and "climate change" is often used to describe human-specific impacts.

Scientists actively work to understand past and future climate by using observations and theoretical models. Borehole temperature profiles, ice cores, floral and faunal records, glacial and periglacial processes, stable isotope and other sediment analyses, and sea level records serve to provide a climate record that spans the geologic past. More recent data are provided by the instrumental record. Physically based general circulation models are often used in theoretical approaches to match past climate data, make future projections, and link causes and effects in climate change.

Causes

On the broadest scale, the rate at which energy is received from the sun and the rate at which it is lost to space determine the equilibrium temperature and climate of Earth. This energy is distributed around the globe by winds, ocean currents, and other mechanisms to affect the climates of different regions.

Factors that can shape climate are called climate forcings or "forcing mechanisms". These include processes such as variations in solar radiation, variations in the Earth's orbit, mountain-building and continental drift, clouds and changes in greenhouse gas concentrations. There are a variety of climate change feedbacks that can either amplify or diminish the initial forcing. Some parts of the climate system, such as the oceans and ice caps, respond slowly in reaction to climate forcings, while others respond more quickly.

Forcing mechanisms can be either "internal" or "external". Internal forcing mechanisms are natural processes within the climate system itself (e.g., the thermohaline circulation). External forcing mechanisms can be either natural (e.g., changes in solar output) or anthropogenic (e.g., increased emissions of greenhouse gases).

Whether the initial forcing mechanism is internal or external, the response of the climate system might be fast (e.g., a sudden cooling due to airborne volcanic ash reflecting sunlight), slow (e.g. thermal expansion of warming ocean water), or a combination (e.g., sudden loss of albedo in the arctic ocean as sea ice melts, followed by more gradual thermal expansion of the water). Therefore, the climate system can respond abruptly, but the full response to forcing mechanisms might not be fully developed for centuries or even longer.

PREDICCIÓN DE LOS CONCEPTOS QUE VA A TRATAR EL AUTOR

- Diferencia entre clima y tiempo atmosférico

- Causas del cambio

- Consecuencias

- Líneas de acción

- Animales en extinción

DEFINICIÓN DE CONCEPTOS DESDE NUESTRO CONOCIMIENTO

Clima: características constantes de acuerdo a una zona de insolación.

Tiempo atmosférico: depende del clima, se podría decir que son las manifestaciones del clima. Se trata de la apropiación de los factores climáticos en un momento específico.

Consecuencias: Aumento de la temperatura de los océanos.

                          Extinción de animales, cambios en los ecosistemas

                          Probabilidad de mayor catástrofes

                          Destrucción de la capa de ozono

Líneas de acción: Apuntar a la educación ambiental.

                             Campañas ambientales.

                             Disminución del consumo y aumento del cuidado de la tierra.

Animales en extinción: Tigre de bengala, oso polar, el pinguino emperador, tortuga, gato montes, corales de las zonas cálidas.

LO QUE DICE EL AUTOR

- El cambio climático es un cambio significativo y duradero de los patrones del clima.

- Es causado por diversos factores, como ser: la circulación oceánica, las variaciones en la radiación solar, la tectónica de placas, las erupciones volcánicas y las alteraciones inducidas por el hombre en el mundo natural; factores que han generando el calentamiento global. 

- Los científicos trabajan con distintos métodos para estudiar la evolución del clima y lo que se prevé para el futuro en relación al calentamiento global.

BUSCA LAS SIGUIENTES PALABRAS EN LA SOPA DE LETRAS: Atmósfera, clima, radiación, mareas, vientos, presión, ozono, cambio, temperatura, calentamiento, naturaleza, hombre.

¡Puedes encontrar palabras en vertical, horizontal, diagonal y en todos los sentidos!

A

Z

F

R

T

Y

S

P

R

E

S

I

O

N

G

F

J

H

T

P

D

E

G

I

D

R

T

I

E

V

I

E

N

T

O

S

R

F

H

O

E

N

D

O

O

Z

O

C

Z

O

R

R

E

P

M

T

N

Q

H

T

O

T

O

L

A

S

E

T

P

E

A

U

G

E

I

N

N

P

E

Z

N

R

O

T

T

C

A

M

B

I

O

D

I

S

O

E

S

A

U

I

F

P

U

H

S

E

G

F

E

F

D

T

R

T

P

E

N

O

I

C

A

I

D

A

R

M

A

U

O

R

A

S

S

A

L

A

M

M

G

O

L

V

I

A

S

T

D

E

A

I

U

U

H

S

E

N

D

T

D

R

Y

I

S

U

M

Y

I

F

Z

T

R

U

M

A

R

E

A

S

Y

A

T

E

A

D

N

R

U

Y

O

H

E

R

T

F

O

R

L

F

I

A

B

U

E

R

B

M

O

H

H

A

C

A

L

E

N

T

A

M

I

E

N

T

O

I