Search Results - "Krivova, Natalie A"

Solar Irradiance Variability and Climate by Solanki, Sami K, Krivova, Natalie A, Haigh, Joanna D

“…The brightness of the Sun varies on all timescales on which it has been observed, and there is increasing evidence that this has an influence on climate. The…”
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The Sun is less active than other solar-like stars by Reinhold, Timo, Shapiro, Alexander I, Solanki, Sami K, Montet, Benjamin T, Krivova, Natalie A, Cameron, Robert H, Amazo-Gómez, Eliana M

“…The magnetic activity of the Sun and other stars causes their brightness to vary. We investigated how typical the Sun's variability is compared with other…”
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Solar Irradiance Variability is Caused by the Magnetic Activity on the Solar Surface by Yeo, Kok Leng, Solanki, Sami K, Norris, Charlotte M, Beeck, Benjamin, Unruh, Yvonne C, Krivova, Natalie A

“…The variation in the radiative output of the Sun, described in terms of solar irradiance, is important to climatology. A common assumption is that solar…”
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Time Lag Between Cosmic-Ray and Solar Variability: Sunspot Numbers and Open Solar Magnetic Flux by Koldobskiy, Sergey A., Kähkönen, Riikka, Hofer, Bernhard, Krivova, Natalie A., Kovaltsov, Gennady A., Usoskin, Ilya G.

“…Solar magnetic activity drives the dominant 11-year cyclic variability of different space environmental indices, but they can be delayed with respect to the…”
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Full-disc Ca ii K observations—A window to past solar magnetism by Chatzistergos, Theodosios, Krivova, Natalie A., Ermolli, Ilaria

“…Full-disc observations of the Sun in the Ca  ii K  line provide one of the longest collections of solar data. First such observations were made in 1892 and…”
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Analyzing Solar Cycles by Solanki, Sami K., Krivova, Natalie A.

“…Does the recent longer-than-usual minimum in sunspot activity indicate that we are heading for an extended period of solar inactivity? Since observational…”
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Modelling solar irradiance from ground-based photometric observations by Chatzistergos, Theodosios, Ermolli, Ilaria, Giorgi, Fabrizio, Krivova, Natalie A., Puiu, Cosmin Constantin

“…Total solar irradiance (TSI) has been monitored from space since 1978, i.e. for about four solar cycles. The measurements show a prominent variability in phase…”
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Predictions of Astrometric Jitter for Sun-like Stars. I. The Model and Its Application to the Sun as Seen from the Ecliptic by Shapiro, Alexander I., Solanki, Sami K., Krivova, Natalie A.

“…Abstract The advent of Gaia, capable of measuring stellar wobbles caused by orbiting planets, raised interest in the astrometric detection of exoplanets…”
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Climate responses to SATIRE and SIM-based spectral solar forcing in a 3D atmosphere-ocean coupled GCM by Wen, Guoyong, Cahalan, Robert F., Rind, David, Jonas, Jeffrey, Pilewskie, Peter, Wu, Dong L., Krivova, Natalie A.

“…We apply two reconstructed spectral solar forcing scenarios, one SIM (Spectral Irradiance Monitor) based, the other the SATIRE (Spectral And Total Irradiance…”
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Spectral variability of photospheric radiation due to faculae – II. Facular contrasts for cool main-sequence stars by Norris, Charlotte M, Unruh, Yvonne C, Witzke, Veronika, Solanki, Sami K, Krivova, Natalie A, Shapiro, Alexander I, Yeo, Kok Leng, Cameron, Robert, Beeck, Benjamin

“…ABSTRACT Magnetic features on the surface of stars, such as spots and faculae, cause stellar spectral variability on time-scales of days and longer. For stars…”
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Solar Irradiance Variations: From Current Measurements to Long-Term Estimates by Solanki, Sami K, Krivova, Natalie A

“…Issue Title: Topical Issue: Space Climate: Direct and Indirect Observations of Long-term Solar Activity Variations of solar total and spectral irradiance are…”
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Understanding the secular variability of solar irradiance: the potential of Ca II K observations by Chatzistergos, Theodosios, Krivova, Natalie A., Ermolli, Ilaria

“…With the increasing concern about climate change, it is important to have accurate information on the individual contributions by the potential driving agents,…”
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Delving into the Historical Ca ii K Archive from the Kodaikanal Observatory: The Potential of the Most Recent Digitized Series by Chatzistergos, Theodosios, Ermolli, Ilaria, Solanki, Sami K., Krivova, Natalie A., Banerjee, Dipankar, Jha, Bibhuti K., Chatterjee, Subhamoy

“…Full-disc Ca  ii  K photographic observations of the Sun carry direct information as regards the evolution of solar-plage regions for more than a century and…”
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Publisher's Note: Solar Irradiance Variability is Caused by the Magnetic Activity on the Solar Surface [Phys. Rev. Lett. 119, 091102 (2017)] by Yeo, Kok Leng, Solanki, Sami K, Norris, Charlotte M, Beeck, Benjamin, Unruh, Yvonne C, Krivova, Natalie A

“…This corrects the article DOI: 10.1103/PhysRevLett.119.091102…”
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Magnetic origin of the discrepancy between stellar limb-darkening models and observations by Kostogryz, Nadiia M., Shapiro, Alexander I., Witzke, Veronika, Cameron, Robert H., Gizon, Laurent, Krivova, Natalie A., Ludwig, Hans-G., Maxted, Pierre F. L., Seager, Sara, Solanki, Sami K., Valenti, Jeff

“…Stars appear darker at their limbs than at their disk centres because at the limb we are viewing the higher and cooler layers of stellar photospheres. Yet,…”
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Solar Irradiance Models and Measurements: A Comparison in the 220–240 nm wavelength band by Unruh, Yvonne C., Ball, Will T., Krivova, Natalie A.

“…Solar irradiance models that assume solar irradiance variations to be due to changes in the solar surface magnetic flux have been successfully used to…”
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Models of solar irradiance variations: Current status by Krivova, Natalie A., Solanki, Sami K.

“…Regular monitoring of solar irradiance has been carried out since 1978 to show that solar total and spectral irradiance varies at different time scales…”
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Long-term changes in solar activity and irradiance by Chatzistergos, Theodosios, Krivova, Natalie A., Yeo, Kok Leng

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Assessment of different sunspot number series using the cosmogenic isotope 44 Ti in meteorites by Asvestari, Eleanna, Usoskin, Ilya G., Kovaltsov, Gennady A., Owens, Mathew J., Krivova, Natalie A., Rubinetti, Sara, Taricco, Carla

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Climate and carbon-cycle variability over the last millennium by Jungclaus, J. H., Lorenz, S. J., Timmreck, C., Reick, C. H., Brovkin, V., Six, K., Segschneider, J., Giorgetta, M. A., Crowley, T. J., Pongratz, J., Krivova, N. A., Vieira, L. E., Solanki, S. K., Klocke, D., Botzet, M., Esch, M., Gayler, V., Haak, H., Raddatz, T. J., Roeckner, E., Schnur, R., Widmann, H., Claussen, M., Stevens, B., Marotzke, J.

“…A long-standing task in climate research has been to distinguish between anthropogenic climate change and natural climate variability. A prerequisite for…”
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