Often curvilinear, but sometimes diffuse surface features that are characteristically high albedo, optically immature, and associated with magnetic anomalies (Kramer et al. 2011b).
A type of albedo feature
Sinuous to irregular patterns. Often appear as curvilinear or looping pattern. Sometimes exhibit simpler shapes such as a single loop or diffuse bright spot. The bright appearance and curvilinear shape of lunar swirls are often accentuated by low-albedo regions that wind between the bright swirls, called dark lanes (Bell and Hawke 1981).
Swirls show anomalously high albedo and the spectral characteristics of immature material (little darkening and reddening of the spectrum due to space weathering). Lunar swirls are associated with magnetic anomalies (Fig. 1), although not every magnetic anomaly (especially weaker ones) has an identified swirl (Kramer et al. 2009). The swirls have no topographic expression (they overprint the surface on which they...
KeywordsSolar Wind Magnetic Anomaly Solar Wind Proton High Albedo Solar Wind Interaction
- Bell JF, Hawke BR (1981) The Reiner Gamma formation: composition and origin as derived from remote sensing observations. Proc Lunar Planet Sci Conf, 12th, Houston, pp 679–694Google Scholar
- Blewett DT (2011) Correction to Lunar swirls: examining crustal magnetic anomalies and space weathering trends. J Geophys Res 116, E06002. doi:0.1029/2011JE003852Google Scholar
- Blewett DT, Hawke BR, Lucey PG (2005) Lunar optical maturity investigations: a possible recent impact crater and a magnetic anomaly. J Geophys Res 110:E04015Google Scholar
- Blewett D, Coman EI, Hawke BR, Gillis-Davis J, Purucker M, Hughes C (2011) Lunar swirls: examining crustal magnetic anomalies and space weathering trends. J Geophys Res 116:E02002. doi:10.1029/2010JE003656Google Scholar
- El-Baz F (1972) The Alhazen to Abul Wafa Swirl Belt: an extensive field of light-colored sinuous markings, Apollo 16: preliminary science report. NASA Spec Publ SP 315:29–93Google Scholar
- Hemingway D, Garrick-Bethell I (2012) Insights into Lunar swirl morphology and magnetic source geometry: models for the Reiner Gamma and Airy anomalies. 43rd Lunar Planet Sci Conf, abstract #1735, HoustonGoogle Scholar
- Hood LL, Williams CR (1989) The lunar swirls – distribution and possible origins. Proc Lunar Planet Sci Conf 19:99–113, HoustonGoogle Scholar
- Hood LL & Artemieva NA (2008) Antipodal effects of lunar basin-forming impacts: Initial 3D simulations and comparisons with observations. Icarus 193:485-502Google Scholar
- Kramer G, Blewett D, Hood L, Halekas J, Noble S, Hawke BR, Kletetschka G, Harnett E, Garrick-Bethell I (2009) The Lunar Swirls: a white paper to the NASA Decadal SurveyGoogle Scholar
- Kramer GY, Combe J-P, Harnett EM, Hawke BR, Noble SK, Blewett DT, McCord TB, Giguere TA (2011a) Characterization of lunar swirls at Mare Ingenii: a model for space weathering at magnetic anomalies. J Geophys Res 116:E04008. doi:10.1029/2010JE003669Google Scholar
- Kramer GY, Besse S, Dhingra D, Nettles J, Klima R, Garrick-Bethell I, Clark RN, Combe J-P, Head JW III, Taylor LA, Pieters CM, Boardman B, McCord TB (2011b) M3 spectral analysis of lunar swirls and the link between optical maturation and surface hydroxyl formation at magnetic anomalies. J Geophys Res 116:E00G18. doi:10.1029/2010JE003729Google Scholar