APA   Click to copy
Borthakur, M., Sinnhuber, M., & Braesicke, P. Quantifying the impact of variable solar forcings on sudden stratospheric warmings (SSWs). In preparation.

Chicago/Turabian   Click to copy
Borthakur, Monali, Miriam Sinnhuber, and Peter Braesicke. “Quantifying the Impact of Variable Solar Forcings on Sudden Stratospheric Warmings (SSWs).” In preparation, n.d.

MLA   Click to copy
Borthakur, Monali, et al. Quantifying the Impact of Variable Solar Forcings on Sudden Stratospheric Warmings (SSWs). In preparation.

@unpublished{monali-a,
  title = {Quantifying the impact of variable solar forcings on sudden stratospheric warmings (SSWs)},
  author = {Borthakur, Monali and Sinnhuber, Miriam and Braesicke, Peter},
  howpublished = {In preparation}
}