Jennifer Guidi wants to share ‘calm and joy’ in her vibrant landscapes and abstractions, she says of paintings now on view at Gagosian Gallery in Chelsea. Based on views of the hills in LA and in southern France where the artist recently exhibited at the Richard Rogers Drawing Gallery, Guidi uses her signature materials of sand on canvas to depict pleasingly smooth geological forms as a counter to explosive activity in the skies. Starburst patterns appear in both representational and abstract canvases, spreading color and energy over the landscapes like a shower of beneficence. (On view through March 2nd).