Length of the Solar Cycle: An Indicator of Solar Activity Closely Associated with Climate

  title={Length of the Solar Cycle: An Indicator of Solar Activity Closely Associated with Climate},
  author={E. Friis-christensen and Knud Lassen},
  pages={698 - 700}
It has recently been suggested that the solar irradiance has varied in phase with the 80- to 90-year period represented by the envelope of the 11-year sunspot cycle and that this variation is causing a significant part of the changes in the global temperature. This interpretation has been criticized for statistical reasons and because there are no observations that indicate significant changes in the solar irradiance. A set of data that supports the suggestion of a direct influence of solar… 

Solar Activity and Global Temperature

A major problem in the determination of the magnitude of a possible solar effect on climate is that no physical parameter of solar energy output exists that has been observed long enough to be used

Solar Forcing of Global Climate Change Since The Mid-17th Century

Spacecraft measurements of the sun's total irradiance since 1980 have revealed a long-term variation that is roughly in phase with the 11-year solar cycle. Its origin is uncertain, but may be related

Long-Term Variations in Solar Activity and Their Apparent Effect on the Earth's Climate

The varying length of the 11-year cycle has been found to be strongly correlated with longterm variations of the northern hemisphere land surface air temperature since the beginning of systematic

Newly found evidence of Sun-climate relationships

Solar radiation cycles drive climatic changes interannually and intercyclically. Evidence of the Sun-Climate link was first detected by comparing satellite measured variations in solar total

Solar Activity and Regional Climate

We performed a statistical analysis of the data on summer temperature anomalies in northern Fennoscandia (8–1995 AD) and found that a 70–130-yr cycle is present in this series during most of the time

Signatures of solar activity variability in meteorological parameters




Influence of solar variability on global sea surface temperatures

  • G. Reid
  • Environmental Science
  • 1987
Recent measurements1 have shown that the total solar irradiance decreased at a rate of 0.019% per year between 1980 and 1985, and may still be decreasing. Presumably, this reflects a cyclical

Solar luminosity variations in solar cycle 21

The ACRIM I experiment (Active Cavity Radiometer Irradiance Monitor) on the solar maximum Mission (SMM) satellite has provided a nearly continuous record of solar total irradiance variations since

An Empirical Model of Total Solar Irradiance Variation Between 1874 and 1988

The model provides a remarkably good representation of the irradiance variations observed by satellite-borne radiometers between 1980 and 1988, suggesting that the mean total irradiance has been rising steadily since about 1945, with the largest peak so far at about 1980 and another large peak expected during the current solar cycle 22.

The solar wind at the turn of the century

GEOMAGNETIC ACTIVITY is driven by the solar wind, so information on the past history of the wind can be derived from studies of geomagnetic indices1–3. Comparison of geomagnetic activity and sunspot

The influence of solar forcing trends on global mean temperature since 1861

IT has been suggested1–5 that solar variability may be a significant contributor to the long-term warming trend that has been observed in global mean surface air temperature since the mid-nineteenth

Global trends of measured surface air temperature

We analyze surface air temperature data from available meteorological stations with principal focus on the period 1880–1985. The temperature changes at mid- and high latitude stations separated by

The Maunder Minimum

In the years around a sunspot maximum there is seldom a day when a number of spots cannot be seen, and often hundreds are present.

Climate: present, past and future

  • H. Lamb
  • Environmental Science, Geography
  • 1977
Climate: present, past and future , Climate: present, past and future , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی

The IPCC Scientific Assessment (Intergovernmental Panel on Climate Change, World Meteorological Organization, United Nations Environment Programme

  • Climate Change
  • 1990

The complete data set is available from the authors upon request