Experimentos Espaciales de PMODWRC Para Medir La Constante Solar y La Influencia de Irradiance Solar...

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ysikalisch-Meteorologisches Observatorium Davos

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PMOD 1907-2007

WRC since 1971

Two activities:

Energy balance and influence

of radiation on the terrestrialclimate

3/4 Green house effect

3/4 Sun-Earth connection

Research

Space experiments of PMOD/WRCto measure the solar constant and

the influence of the solar irradiance

on the terrestrial climate

Werner Schmutz

PMOD/WRC

ISPMSRS'07 12-14 March 2007 Davos, Switzerland

erview




Overview

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Absolutely calibrated

TSI observations

TIM/SORCE2003 -

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Past observations of the Total Solar Irradiance (TSI) and the TSI-composite

Why irradiance measurements

Why continue to measure TSI

Future irradiance observations

erview




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Traceable Radiometry Underpinning

Terrestrial- & Helio- Studies

Mission proposal: TRUTHS

Nigel Fox NPL

[email protected]

James Aiken Plym Mar Lab

Xavier Briottet ONERA

John Barnett Ox univ.

Steve Groom Plym Mar Lab

Claus Frohlich PMOD/WRC

Jo Haigh Imp CollOlivier Hagolle CNES Hugh

Kieffer USGS

Judith Lean NRL

John Martin NPL

David Pollock U of Alab.

Mike Sandford RAL

Michael Schaepman U of Zur

Werner Schmutz PMOD/WRC

Keith Shine Uni of Read

Phil Teillet CCRS

Theo Theocharous NPL

Kurtis Thome U of Ariz

Terry Quinn BIPM

Michel Verstraete JRC(Italy)

Emma Woolliams NPL

Ed Zalewski U of Ariz

confidence.

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,

- ns rmens c ange

and prepar i n -o r b i

Difficulties:- Bias bt

MIS

A side note: Need for improved Quality Assurance!

Courtesy of Nigel Fox

. ex

WMO areg

debate

2 dedicate d t o c a l i b r a t i o n e e n t an racea y pro ems

No consistent st

e

proposing

erview

mailto:[email protected]






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TSI – including TIM/SORCE

Absolute measurements cannot be used toconstruct a long-term record

Æ Merge to a relative composite

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TSI – comparisons of differentcomposites

Courtesy of Claus Fröhlich

Different composites predictdifferent long-term trends:

erview




's

re

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Why irradiance measurements?

Space Climate:

Long term rcord of the Solr Irradince Onlong term, it is not known what dominates, secular hang f Total Solr Irradiance or Influence of the long-term variations on the chem

mposit ion of he upp t thspectrl (UV) variationpropagation to the tropos

But: although UV variations are much larger (up to climate

100%) all spectral variations are highly correlatedto TSI variations

n s or ermIUGG 2007: Rozano E Ega tosphe re i sd Mitg f t

i m ulation of theSession MS020p temperaturerespose to the soar rradiance UV(Ly-α and 220 nm Herzberg band)rradiance Solar Activity and its Influences on the

?

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What is the influence of the Sun on the climate?

Graphics: Dr. J. Beer EAWAG, Switzerland

erview




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Climate Anomaliesversus solar influence

River Thames in London 1813/1814

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Predicted long-term trend of

TSI 100 years

Different “educated”

guesses!

erview




Three minima in the latest

(August 2006) version of the PMOD-composite

T p r n m 0 1 5W / m 2 ( = 0 p p m

irradiance measurements at theowe than the previus

Th th ii t i thi thighest possible accuracy!within ±0.08 W/m

2(0006% or 60

ÎSolution: twin instrument

experiment as VIRGO on SoHO

and PREMOS+SOVAP on PICARDp p p

http:www.pmodwrc.ch follow the links:

4 projects 4 Solar Constant / Solar Irradiance 1 2 . 3 . 2

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Predicted long-term trend of TSI 400 years

Different “edu

guesses!

Suspected secular change of TSIneeds to be confirmedobservationallyted”

4 requires long term observation

of several decades!

erview




Future TSI experiments

D I A R A D P M O 6 S P M L O I SoHO launch 2. December 1995

VIRGO instruments

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Two absolute radiometers:- PMO6V (A & B)

- DIARAD (L & R)

Precision Filter Radiometer (blue, green, red)

Image of the Sun in the green light in low resolution

(12 pixels): 1 minute sampling ___________

VIRGO/SoHO:operational since 1996

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3/4 GLORY (USA: no launch date – ready tobe used as gap-filler)

3/4 SOVIM/ISS and

3/4 PREMOS+SOVAP/PICARD

approved TSI experiments of PMOD/WRC

3/4 RAD/KuaFu-A only future TSI experiment

presently being considered

erview




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Space experiments are beingbuilt in house at PMOD/WRC

today

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Space experiments of PMOD/WRC

erview




PICARD (PI G. Thuillier)PREMOS – SOVAP – SODISM

Total Solar Irradiance

Filter Radiometers

tellite

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Total Solar Irradiance

observations until 2012

CRIM III 2000 - ?

IRGO/SOHO 1996 - 2009 (+?

TIM/SORCE 2003 - 2008 - (?)

SOVIM/ISS 2008 – 2009 ?

PREMOS/PICARD 2009 – 2011

SOVAP/PICARD

(SDO 2008-2012 has no TSI instrument)

System may have TSI t –but are planned o startnot earlier than 2009 (?), more liky as 201

NPOESS 012

National P ig Operational Environmental

erview




. .

Total Solar Irradianceobservations until 2012

ACRIM III 2000 - ?

VIRGO/SOHO 1996 - 2007 - 2009

TIM/SORCE 2003 – 2008 - (GLORY?)

SOVIM/ISS 2007 - 2009 ?

PREMOS-TSI/PICARD 2009 - 2013

SOVAP/PICARD

(SDO 2008-2012 has no TSI instrument)

KuaFu-A 2012 -irradiance measurement experiment comprising:Æ SIM = Solar Irradiance Monitor (CN: PI Daren Lu) Æ DOR = Davos Observatory Radiometer (CH: Werner Schmutz)

. .

onc us ons

Short-term irradiance variations (days) are closely

related to variations of the chemical composition of theupper atmosphere

Æ space weather: operational monitoring of TSI

Long-term irradiance variations (tens to thousands of

years) are probably (!) related to climate variations

Æ space climate: secular long term change of TSI

TSI observations are most likely continuous andoverlapping until about 2012

RAD/KuaFu-A would be a matching continuation

erview




Integration of LYRA

on PROBA2

5.3.2007

Thank you for your attention!

Experimentos Espaciales de PMODWRC Para Medir La Constante Solar y La Influencia de Irradiance Solar...

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