TY  - JOUR
A1  - Saikin, Anthony
A1  - Jordanova, Vania K.
A1  - Zhang, J. C.
A1  - Smith, C. W.
A1  - Spence, H. E.
A1  - Larsen, B. A.
A1  - Reeves, G. D.
A1  - Torbert, R. B.
A1  - Kletzing, C. A.
A1  - Zhelayskaya, I. S.
A1  - Shprits, Yuri Y.
T1  - Comparing simulated and observed EMIC wave amplitudes using in situ Van
JF  - Journal of Atmospheric and Solar-Terrestrial Physics
N2  - We perform a statistical study calculating electromagnetic ion cyclotron (EMIC) wave amplitudes based off in situ plasma measurements taken by the Van Allen Probes’ (1.1–5.8 Re) Helium, Oxygen, Proton, Electron (HOPE) instrument. Calculated wave amplitudes are compared to EMIC waves observed by the Electric and Magnetic Field Instrument Suite and Integrated Science on board the Van Allen Probes during the same period. The survey covers a 22-month period (1 November 2012 to 31 August 2014), a full Van Allen Probe magnetic local time (MLT) precession. The linear theory proxy was used to identify EMIC wave events with plasma conditions favorable for EMIC wave excitation. Two hundred and thirty-two EMIC wave events (103 H+-band and 129 He+-band) were selected for this comparison. Nearly all events selected are observed beyond L = 4. Results show that calculated wave amplitudes exclusively using the in situ HOPE measurements produce amplitudes too low compared to the observed EMIC wave amplitudes. Hot proton anisotropy (Ahp) distributions are asymmetric in MLT within the inner (L < 7) magnetosphere with peak (minimum) Ahp, ∼0.81 to 1.00 (∼0.62), observed in the dawn (dusk), 0000 < MLT ≤ 1200 (1200 < MLT ≤ 2400), sectors. Measurements of Ahp are found to decrease in the presence of EMIC wave activity. Ahp amplification factors are determined and vary with respect to EMIC wave-band and MLT. He+-band events generally require double (quadruple) the measured Ahp for the dawn (dusk) sector to reproduce the observed EMIC wave amplitudes.
KW  - EMIC waves
KW  - Van Allen Probes
KW  - Linear theory
KW  - Wave generation
Y1  - 2018
U6  - https://doi.org/10.1016/j.jastp.2018.01.024
SN  - 1364-6826
SN  - 1879-1824
VL  - 177
SP  - 190
EP  - 201
PB  - Elsevier
CY  - Oxford
ER  - 
TY  - JOUR
A1  - Banks, Jo Ann
A1  - Nishiyama, Tomoaki
A1  - Hasebe, Mitsuyasu
A1  - Bowman, John L.
A1  - Gribskov, Michael
A1  - dePamphilis, Claude
A1  - Albert, Victor A.
A1  - Aono, Naoki
A1  - Aoyama, Tsuyoshi
A1  - Ambrose, Barbara A.
A1  - Ashton, Neil W.
A1  - Axtell, Michael J.
A1  - Barker, Elizabeth
A1  - Barker, Michael S.
A1  - Bennetzen, Jeffrey L.
A1  - Bonawitz, Nicholas D.
A1  - Chapple, Clint
A1  - Cheng, Chaoyang
A1  - Correa, Luiz Gustavo Guedes
A1  - Dacre, Michael
A1  - DeBarry, Jeremy
A1  - Dreyer, Ingo
A1  - Elias, Marek
A1  - Engstrom, Eric M.
A1  - Estelle, Mark
A1  - Feng, Liang
A1  - Finet, Cedric
A1  - Floyd, Sandra K.
A1  - Frommer, Wolf B.
A1  - Fujita, Tomomichi
A1  - Gramzow, Lydia
A1  - Gutensohn, Michael
A1  - Harholt, Jesper
A1  - Hattori, Mitsuru
A1  - Heyl, Alexander
A1  - Hirai, Tadayoshi
A1  - Hiwatashi, Yuji
A1  - Ishikawa, Masaki
A1  - Iwata, Mineko
A1  - Karol, Kenneth G.
A1  - Koehler, Barbara
A1  - Kolukisaoglu, Uener
A1  - Kubo, Minoru
A1  - Kurata, Tetsuya
A1  - Lalonde, Sylvie
A1  - Li, Kejie
A1  - Li, Ying
A1  - Litt, Amy
A1  - Lyons, Eric
A1  - Manning, Gerard
A1  - Maruyama, Takeshi
A1  - Michael, Todd P.
A1  - Mikami, Koji
A1  - Miyazaki, Saori
A1  - Morinaga, Shin-ichi
A1  - Murata, Takashi
A1  - Müller-Röber, Bernd
A1  - Nelson, David R.
A1  - Obara, Mari
A1  - Oguri, Yasuko
A1  - Olmstead, Richard G.
A1  - Onodera, Naoko
A1  - Petersen, Bent Larsen
A1  - Pils, Birgit
A1  - Prigge, Michael
A1  - Rensing, Stefan A.
A1  - Mauricio Riano-Pachon, Diego
A1  - Roberts, Alison W.
A1  - Sato, Yoshikatsu
A1  - Scheller, Henrik Vibe
A1  - Schulz, Burkhard
A1  - Schulz, Christian
A1  - Shakirov, Eugene V.
A1  - Shibagaki, Nakako
A1  - Shinohara, Naoki
A1  - Shippen, Dorothy E.
A1  - Sorensen, Iben
A1  - Sotooka, Ryo
A1  - Sugimoto, Nagisa
A1  - Sugita, Mamoru
A1  - Sumikawa, Naomi
A1  - Tanurdzic, Milos
A1  - Theissen, Guenter
A1  - Ulvskov, Peter
A1  - Wakazuki, Sachiko
A1  - Weng, Jing-Ke
A1  - Willats, William W. G. T.
A1  - Wipf, Daniel
A1  - Wolf, Paul G.
A1  - Yang, Lixing
A1  - Zimmer, Andreas D.
A1  - Zhu, Qihui
A1  - Mitros, Therese
A1  - Hellsten, Uffe
A1  - Loque, Dominique
A1  - Otillar, Robert
A1  - Salamov, Asaf
A1  - Schmutz, Jeremy
A1  - Shapiro, Harris
A1  - Lindquist, Erika
A1  - Lucas, Susan
A1  - Rokhsar, Daniel
A1  - Grigoriev, Igor V.
T1  - The selaginella genome identifies genetic changes associated with the evolution of vascular plants
JF  - Science
N2  - Vascular plants appeared similar to 410 million years ago, then diverged into several lineages of which only two survive: the euphyllophytes (ferns and seed plants) and the lycophytes. We report here the genome sequence of the lycophyte Selaginella moellendorffii (Selaginella), the first nonseed vascular plant genome reported. By comparing gene content in evolutionarily diverse taxa, we found that the transition from a gametophyte- to a sporophyte-dominated life cycle required far fewer new genes than the transition from a nonseed vascular to a flowering plant, whereas secondary metabolic genes expanded extensively and in parallel in the lycophyte and angiosperm lineages. Selaginella differs in posttranscriptional gene regulation, including small RNA regulation of repetitive elements, an absence of the trans-acting small interfering RNA pathway, and extensive RNA editing of organellar genes.
Y1  - 2011
U6  - https://doi.org/10.1126/science.1203810
SN  - 0036-8075
VL  - 332
IS  - 6032
SP  - 960
EP  - 963
PB  - American Assoc. for the Advancement of Science
CY  - Washington
ER  -